Chevy Nova Forum banner
461 - 480 of 495 Posts

·
Premium Member
Joined
·
970 Posts
Zinc

This is why my 1970 Chevelle now has a 1987 HO 350 which came with a factory roller cam, and why my 1969 Nova now has a Generation VI BBC engine which also started with a factory roller cam.
 

·
Registered
Joined
·
2,497 Posts
Wear protection reference categories are:

*** Over 90,000 psi = OUTSTANDING protection

*** 75,000 to 90,000 psi = GOOD protection

*** 60,000 to 75,000 psi = MODEST protection

*** Below 60,000 psi = UNDESIREABLE
The higher the psi number, the better the wear protection.

1. 10W30 Lucas Racing Only synthetic = 106,505 psi
zinc = 2642 ppm
phos = 3489 ppm
ZDDP= 3000 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.

2. 10W30 Valvoline NSL (Not Street Legal) Conventional Racing Oil = 103,846 psi
zinc = 1669 ppm
phos = 1518 ppm
ZDDP = 1500 ppm
NOTE: Due to its very low TBN value, this oil is only suitable for short term racing use, and is not suitable for street use.

3. 10W30 Valvoline VR1 Conventional Racing Oil (silver bottle) = 103,505 psi
zinc = 1472 ppm
phos = 1544 ppm
ZDDP = 1500 ppm

4. 10W30 Valvoline VR1 Synthetic Racing Oil, API SL (black bottle) = 101,139 psi
zinc = 1180 ppm
phos = 1112 ppm
ZDDP = 1100 ppm

5. 30 wt Red Line Race Oil synthetic = 96,470 psi
zinc = 2207 ppm
phos = 2052 ppm
ZDDP = 2100 ppm
NOTE: This oil is suitable for short term racing use only, and is not suitable for street use.

6. 10W30 Amsoil Z-Rod Oil synthetic = 95,360 psi
zinc = 1431 ppm
phos = 1441 ppm
ZDDP = 1400 ppm

7. 10W30 Quaker State Defy, API SL semi-synthetic = 90,226 psi
zinc = 1221 ppm
phos = 955 ppm
ZDDP = 1000 ppm

8. 10W30 Joe Gibbs HR4 Hotrod Oil synthetic = 86,270 psi
zinc = 1247 ppm
phos = 1137 ppm
ZDDP = 1100 ppm

9. 15W40 RED LINE Diesel Oil synthetic, API CJ-4/CI-4 PLUS/CI-4/CF/CH-4/CF-4/SM/SL/SH/EO-O = 85,663 psi
zinc = 1615 ppm
phos = 1551 ppm
ZDDP = 1500 ppm

10. 5W30 Lucas API SM synthetic = 76,584 psi
zinc = 1134 ppm
phos = 666 ppm
ZDDP = 900 ppm

11. 5W50 Castrol Edge with Syntec API SN, synthetic, formerly Castrol Syntec, black bottle = 75,409 psi
zinc = 1252 ppm
phos = 1197 ppm
ZDDP = 1200 ppm

12. 5W30 Royal Purple XPR (Extreme Performance Racing) synthetic = 74,860 psi
zinc = 1421 ppm
phos = 1338 ppm
ZDDP = 1300 ppm

13. 5W40 MOBIL 1 TURBO DIESEL TRUCK synthetic, API CJ-4, CI-4 Plus, CI-4, CH-4 and ACEA E7 = 74,312 psi
zinc = 1211 ppm
phos = 1168 ppm
ZDDP = 1100 ppm

14. 15W40 CHEVRON DELO 400LE Diesel Oil, conventional, API CJ-4, CI-4 Plus, CH-4, CF-4,CF/SM, = 73,520 psi
zinc = 1519 ppm
phos = 1139 ppm
ZDDP = 1300 ppm

15. 15W40 MOBIL DELVAC 1300 SUPER Diesel Oil conventional, API CJ-4, CI-4 Plus, CI-4, CH-4/SM, SL = 73,300 psi
zinc = 1297 ppm
phos = 1944 ppm
ZDDP = 1600 ppm

16. 15W40 Farm Rated Heavy Duty Performance Diesel, CI-4, CH-4, CG-4, CF/SL, SJ (conventional) = 73,176 psi
zinc = 1325ppm
phos = 1234 ppm
ZDDP = 1200 ppm

17. 15W40 “NEW” SHELL ROTELLA T Diesel Oil conventional, API CJ-4, CI-4 Plus, CH-4, CF-4,CF/SM = 72,022 psi
zinc = 1454 ppm
phos = 1062 ppm
ZDDP = 1200 ppm

18. 0W30 Brad Penn, Penn Grade 1 (semi-synthetic) = 71,377 psi
zinc = 1621 ppm
phos = 1437 ppm
ZDDP = 1500 ppm

19. 15W40 “OLD” SHELL ROTELLA T Diesel Oil conventional, API CI-4 PLUS, CI-4, CH-4,CG-4,CF-4,CF,SL, SJ, SH = 71,214 psi
zinc = 1171 ppm
phos = 1186 ppm
ZDDP = 1100 ppm

20. 10W30 Brad Penn, Penn Grade 1 (semi-synthetic) = 71,206 psi
zinc = 1557 ppm
phos = 1651 ppm
ZDDP = 1600 ppm

21. 15W50 Mobil 1, API SN synthetic = 70,235 psi
zinc = 1133 ppm
phos = 1,168 ppm
ZDDP = 1100 ppm

22. 30wt Edelbrock Break-In Oil conventional = 69,160 psi
zinc = 1545 ppm
phos = 1465 ppm
ZDDP = 1500 ppm

23. 10W40 Edelbrock synthetic = 68,603 psi
zinc = 1193 ppm
phos = 1146 ppm
ZDDP = 100 ppm

24. 15W40 LUCAS MAGNUM Diesel Oil, conventional, API CI-4,CH-4, CG-4, CF-4, CF/SL = 66,476 psi
zinc = 1441 ppm
phos = 1234 ppm
ZDDP = 1300 ppm

25. 10W30 Royal Purple HPS (High Performance Street) synthetic = 66,211 psi
zinc = 1774 ppm
phos = 1347 ppm
ZDDP = 1500 ppm

26. 10W40 Valvoline 4 Stroke Motorcycle Oil conventional, API SJ = 65,553 psi
zinc = 1154 ppm
phos = 1075 ppm
ZDDP = 1100 ppm

27. 5W30 Klotz Estorlin Racing Oil, API SL synthetic = 64,175 psi
zinc = 1765 ppm
phos = 2468 ppm
ZDDP = 2100 ppm

28. “ZDDPlus” added to Royal Purple 20W50, API SN, synthetic = 63,595 psi
zinc = 2436 ppm (up 1848 ppm)
phos = 2053 ppm (up 1356 ppm)
ZDDP = 2200 ppm
The amount of ZDDPlus added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 24% LOWER than this oil had BEFORE the ZDDPlus was added to it. Most major Oil Companies say to NEVER add anything to their oils, because adding anything will upset the carefully balanced additive package, and ruin the oil’s chemical composition. And that is precisely what we see here. Adding ZDDPlus SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

29. Royal Purple 10W30 Break-In Oil conventional = 62,931 psi
zinc = 1170 ppm
phos = 1039 ppm
ZDDP = 1100 ppm

30. 10W30 Lucas Hot Rod & Classic Hi-Performance Oil, conventional = 62,538 psi
zinc = 2116 ppm
phos = 1855 ppm
ZDDP = 1900 ppm

31. 10W30 Comp Cams Muscle Car & Street Rod Oil, synthetic blend = 60,413 psi
zinc = 1673 ppm
phos = 1114 ppm
ZDDP = 1300 ppm

32. 10W40 Torco TR-1 Racing Oil with MPZ conventional = 59,905 psi
zinc = 1456 ppm
phos = 1150 ppm
ZDDP = 1300 ppm

33. “ZDDPlus” added to O’Reilly (house brand) 5W30, API SN, conventional = 56,728 psi
zinc = 2711 ppm (up 1848 ppm)
phos = 2172 ppm (up 1356 ppm)
ZDDP = 2400 ppm
The amount of ZDDPlus added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 38% LOWER than this oil had BEFORE the ZDDPlus was added to it. Adding ZDDPlus SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

34. 10W40 Summit Racing Premium Racing Oil, API SL conventional = 59,483 psi
zinc = 1764 ppm
phos = 1974 ppm
Claimed ZDDP level on the bottle = 1800 ppm
NOTE: Summit discontinued this line of oil, as of spring of 2013.

35. “ZDDPlus” added to Motorcraft 5W30, API SN, synthetic = 56,243 psi
zinc = 2955 ppm (up 1848 ppm)
phos = 2114 ppm (up 1356 ppm)
ZDDP = 2500 ppm
The amount of ZDDPlus added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 12% LOWER than this oil had BEFORE the ZDDPlus was added to it. Adding ZDDPlus SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

36. “Edelbrock Zinc Additive” added to Royal Purple 5W30, API SN, synthetic = 54,044 psi
zinc = 1515 ppm (up 573 ppm)
phos = 1334 ppm (up 517 ppm)
ZDDP = 1400 ppm
The amount of Edelbrock Zinc Additive added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was a whopping 36% LOWER than this oil had BEFORE the Edelbrock Zinc Additive was added to it. Adding Edelbrock Zinc Additive SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

37. 10W30 Comp Cams Break-In Oil conventional = 51,749 psi
zinc = 3004 ppm
phos = 2613 ppm
ZDDP = 2800 ppm

38. “Edelbrock Zinc Additive” added to Lucas 5W30, API SN, conventional = 51,545 psi
zinc = 1565 ppm (up 573 ppm)
phos = 1277 ppm (up 517 ppm)
ZDDP = 1400 ppm
The amount of Edelbrock Zinc Additive added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was a “breath taking” 44% LOWER than this oil had BEFORE the Edelbrock Zinc Additive was added to it. Adding Edelbrock Zinc Additive SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

39. “Edelbrock Zinc Additive” added to Motorcraft 5W30, API SN, synthetic = 50,202 psi
zinc = 1680 ppm (up 573 ppm)
phos = 1275 ppm (up 517 ppm)
ZDDP = 1400 ppm
The amount of Edelbrock Zinc Additive added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 22% LOWER than this oil had BEFORE the Edelbrock Zinc Additive was added to it. Adding Edelbrock Zinc Additive SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

40. 30wt Lucas Break-In Oil conventional = 49,455 psi
zinc = 4483 ppm
phos = 3660 ppm
ZDDP = 4000 ppm

So, as you saw above, the highest ranking high zinc oil that provided the BEST WEAR PROTECTION of this group of 40 high zinc oils, had 3000 ppm ZDDP. But, the lowest ranking high zinc oil had one third MORE ZDDP at 4000 ppm. Even though this lowest ranked oil had far more zinc in it, it provided LESS THAN HALF AS MUCH WEAR PROTECTION, making it by far the worst of all 40 oils tested. Then the 4th place oil had only 1100 ppm ZDDP, and the 7th place oil had only 1000 ppm ZDDP.

So, the results above show 2 distinct things:

1. My tester and test procedure have no problem at all showing excellent performing high zinc oils. Therefore, no one can justifiably argue that my testing somehow works against high zinc oils. The absolute fact is, my oil testing performs worst case torture testing on motor oil. So, an oil HAS TO BE GOOD to produce good results. And we saw many high zinc oils with excellent results here. So, when the naysayers slam the value of my testing, they’re also saying at the same time, that high zinc oils are no good, since my testing shows excellent high zinc oils to provide excellent protection. They can’t have it both ways.

2. This is ABSOLUTE PROOF that not all high zinc oils have equal wear protection capabilities, which is the whole point I’ve been making for well over a year now. And why would anyone think that all high zinc oils are good? Not all tires are good. Not all cylinder heads are good. Not all camshafts are good. The world just doesn’t work that way. Some high zinc oils are quite good and provide excellent wear protection, while other high zinc oils are not good at all, and provide rather poor wear protection. It just depends on the particular oil in question. And that makes it totally clear here, that you simply CANNOT predict an oil’s wear protection capability by looking only at its zinc level. Life is just NOT that simple. If you only look at zinc levels, that is no better than guessing. So, if anyone tells you that you need high levels of zinc for more wear protection, even if it comes from a Cam Company, don’t believe a word of it. Because as you can see above, they have no idea what they are talking about. Would you really want to use the 40th ranked last place oil simply because it has more zinc than the number one ranked oil here? That is just what you’d be doing if you believed the incorrect advice about only looking at zinc levels. The ONLY way to know for sure how much wear protection any given oil can provide, is to look at “dynamic wear testing under load” results, such as I have provided above.

My oil testing data is very similar in concept to dyno testing an engine. An engine dyno test is also dynamic testing under load. For the guys who just want to look at a motor oil zinc level reference chart, that is like looking at an engine’s build sheet instead of its dyno print out. You can decide for yourself which provides more meaningful information.

540 RAT
540 RAT
Expert
Expert

Posts: 733
Joined: Thu Feb 08, 2007 7:21 pm
Location: Southern California
 

·
Registered
Joined
·
422 Posts
Interesting post. Where did all of the testing data come from?
From Bobistheoilguy.com He is an oil analyzer guy.

I personally use #7, Quaker State Defy. Lowest cost of the top 7 and 5 of the ones above it are racing oils. Amsoil Z-Rod is $$$ compared.

I buy mine through Amazon, case of 6 at $38.
 

·
Registered
Joined
·
2 Posts
From Bobistheoilguy.com He is an oil analyzer guy.

I personally use #7, Quaker State Defy. Lowest cost of the top 7 and 5 of the ones above it are racing oils. Amsoil Z-Rod is $$$ compared.

I buy mine through Amazon, case of 6 at $38.

Be careful the next time you buy motor oil!! - the SL QS Defy oil is NO LONGER BEING MADE, & Defy is now SN!, has a new label & even quaker state on the phone said the zinc/phos levels are way down!! :mad:
 

·
Registered
Joined
·
2 Posts
33. “ZDDPlus” added to O’Reilly (house brand) 5W30, API SN, conventional = 56,728 psi
zinc = 2711 ppm (up 1848 ppm)
phos = 2172 ppm (up 1356 ppm)
ZDDP = 2400 ppm
The amount of ZDDPlus added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 38% LOWER than this oil had BEFORE the ZDDPlus was added to it. Adding ZDDPlus SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

35. “ZDDPlus” added to Motorcraft 5W30, API SN, synthetic = 56,243 psi
zinc = 2955 ppm (up 1848 ppm)
phos = 2114 ppm (up 1356 ppm)
ZDDP = 2500 ppm
The amount of ZDDPlus added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 12% LOWER than this oil had BEFORE the ZDDPlus was added to it. Adding ZDDPlus SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

36. “Edelbrock Zinc Additive” added to Royal Purple 5W30, API SN, synthetic = 54,044 psi
zinc = 1515 ppm (up 573 ppm)
phos = 1334 ppm (up 517 ppm)
ZDDP = 1400 ppm
The amount of Edelbrock Zinc Additive added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was a whopping 36% LOWER than this oil had BEFORE the Edelbrock Zinc Additive was added to it. Adding Edelbrock Zinc Additive SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

38. “Edelbrock Zinc Additive” added to Lucas 5W30, API SN, conventional = 51,545 psi
zinc = 1565 ppm (up 573 ppm)
phos = 1277 ppm (up 517 ppm)
ZDDP = 1400 ppm
The amount of Edelbrock Zinc Additive added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was a “breath taking” 44% LOWER than this oil had BEFORE the Edelbrock Zinc Additive was added to it. Adding Edelbrock Zinc Additive SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.

39. “Edelbrock Zinc Additive” added to Motorcraft 5W30, API SN, synthetic = 50,202 psi
zinc = 1680 ppm (up 573 ppm)
phos = 1275 ppm (up 517 ppm)
ZDDP = 1400 ppm
The amount of Edelbrock Zinc Additive added to the oil, was the exact amount the manufacturer called for on the bottle. And the resulting psi value here was 22% LOWER than this oil had BEFORE the Edelbrock Zinc Additive was added to it. Adding Edelbrock Zinc Additive SIGNIFICANTLY REDUCED this oil’s wear prevention capability. Just the opposite of what was promised. Buyer beware.


Posts: 733
Joined: Thu Feb 08, 2007 7:21 pm
Location: Southern California[/quote]

------------------------------------------------------------------------
The results of the above additives SHOCK me! :eek:

Two additives NOT listed above are:
1. RIslone 3X Concentrated Engine Oil Supplement with Zinc Treatment
&
2. Redline Engine Oil/Break-In additive
This is the most economical of the additives.
About $14.25 on ebay incl shipping
scroll down for very useful label on how much to use!!:
http://www.nitemareperformance.150m.com/ZDDP.html

Can anyone test THESE 2? :confused:
 

·
Registered
Joined
·
20 Posts
What we need is for Delphi to start producing the old solid lifter with the stellite slug in the bottom. They are producing the hyd version, Edelbrock sources them in their Performer cam kits. If a solid was available, we could use oils with only minimal amounts of zinc and not have to worry about cam failures.
Roller tappet cams are made from solid billet steel and not cast , so the cam itself would still fail.
 

·
Registered
Joined
·
20 Posts
Interesting- I HAD this problem after only a SHort run time about 2 years ago. I admit that I didn't read everything posted in the 32 pages previous, but I damn sure copied and kept the info that RJY just posted on test results. I was told to Run much cheaper RotellaT and I wouldn't have to worry and since I own several older diesel trucks I always had RotellaT here , BUT- I just noticed that T is being phased out and now the cheaper (non synthetic) grade is called Rotella T4,, soooooo did they all of a sudden pull the zinc out?? SHells website is useless to the differences. thanx, Crossy
 

·
Premium Member
Joined
·
15,966 Posts
interesting- i had this problem after only a short run time about 2 years ago. I admit that i didn't read everything posted in the 32 pages previous, but i damn sure copied and kept the info that rjy just posted on test results. I was told to run much cheaper rotellat and i wouldn't have to worry and since i own several older diesel trucks i always had rotellat here , but- i just noticed that t is being phased out and now the cheaper (non synthetic) grade is called rotella t4,, soooooo did they all of a sudden pull the zinc out?? Shells website is useless to the differences. Thanx, crossy
deleted the zinc years ago.
 

·
Registered
Joined
·
5 Posts
Tractor oil

I'm not sure if anyone is still reading this thread, but I had 2 hydraulic cams go out in 2 different motors within a month. I'm a motor builder, I know a lot of other motor builders, I've researched the ratings on the back of the oil bottles and here's the conclusion I've come to:
The oil companies removed the heavy metals, i.e. Zinc, from a lot of today's oils for multiple reasons, comply with EPA, etc. These metals were necessary for flat tapped cams. They are not necessary for roller cams, which are what all the newer motors run, except diesel motors. Oil manufactured for diesel motors still contains the old metals. So bottom line is run oil designed for diesels. I started running champion 15/40 or mystic 15/40 and it works wonderful. Good oil pressure, no cam issues, etc.
 

·
Registered
Joined
·
30 Posts
Hi fellow Nova nuts...... There has been some discussions for the last 6 or 7 months, maybe longer about which oils contain enough ZDDP for flat tappet cams.

Repinter just quoted me on my conversation with Valvoline... and has doubt, I too have doubt... so I am in search of definitive information on oils that will suit the needs of the flat tappet cam masses....

I have done some searching for the last month or so and have seen various opinions/posts on other fourms but never definitive answers as to which oils are safe for flat tappet cams. I have looked at product data sheets.. some times they read like stereo instructions.... not very help full....

There are very expensive oils out there that claim to have over 1800 PPM of ZDDP. like Champion, Joe Gibbs, and one other that escapes me now. but I wonder about the oil as suited for street use as they all say RACE ONLY.

My own mission has now become to find these oils that are safe to use in High lift, high spring rate cams of flat tappet design for street use.

So far I have identified 4 possible oil manufactures,,,, I will contact them further and ask to speak to a authoritative person for definitive info regarding flat tappet cams and the levels of ZDDP.... so that I may inform my fellow brethren in flat camdom hood if their product is safe to use.

what i would really like to find is am old API rating of S/E or S/G

It looks like one synthetic and 3 conventional oils may meet the needs of our engines....

I have been getting a good bit of education on oil additives and their use and safe levels for protection of flat cams.

I will post up as info becomes available.....
How about diesel oil? At least for break-in.
 

·
Registered
Joined
·
385 Posts
I’ve been running diesel oil (Rotella) for years, never had any issues at all. No additives. This is with milder cams, Speed-Pro brand usually. And these engines are used almost exclusively in competition, lots of RPM and almost no idling. If you’re trying to run a radical cam on the street, with a lot idling, you’re probably going to have problems.
 

·
Registered
Joined
·
179 Posts
Hi fellow Nova nuts...... There has been some discussions for the last 6 or 7 months, maybe longer about which oils contain enough ZDDP for flat tappet cams.

Repinter just quoted me on my conversation with Valvoline... and has doubt, I too have doubt... so I am in search of definitive information on oils that will suit the needs of the flat tappet cam masses....

I have done some searching for the last month or so and have seen various opinions/posts on other fourms but never definitive answers as to which oils are safe for flat tappet cams. I have looked at product data sheets.. some times they read like stereo instructions.... not very help full....

There are very expensive oils out there that claim to have over 1800 PPM of ZDDP. like Champion, Joe Gibbs, and one other that escapes me now. but I wonder about the oil as suited for street use as they all say RACE ONLY.

My own mission has now become to find these oils that are safe to use in High lift, high spring rate cams of flat tappet design for street use.

So far I have identified 4 possible oil manufactures,,,, I will contact them further and ask to speak to a authoritative person for definitive info regarding flat tappet cams and the levels of ZDDP.... so that I may inform my fellow brethren in flat camdom hood if their product is safe to use.

what i would really like to find is am old API rating of S/E or S/G

It looks like one synthetic and 3 conventional oils may meet the needs of our engines....

I have been getting a good bit of education on oil additives and their use and safe levels for protection of flat cams.

I will post up as info becomes available.....
Rollers R So much more Fun.........
 

·
Registered
Joined
·
385 Posts
This was drained out of a 383”, competition only engine. Water in the oil, the head gasket is blown between 4&6. An engine will run with straight water in the oil better then you would believe, antifreeze will eat the bearings. But no shiny metallic look, this is easily seen in the sunlight. The truck was ran in 3 classes Saturday nite, one first place.
 

Attachments

·
Registered
Joined
·
158 Posts
This is a really old thread and had a lot of good info for the time. Please do not follow these recommendations today. First: Diesel oil no longer had the ZDDP it once did. It was removed in the first place due to catalytic converter damage it caused. Diesels did not have them so they left it alone in that oil. Diesels now run cats as well and the ZDDP has been scaled way back in that oil also.

As I had said: good info for the time, but it has all changed. The gasoline oil ratings have changed and diesel oil is now CK. change never ends. :)

Bob
 

·
Registered
Joined
·
385 Posts
All modern motor oils are pretty good, diesel oil is dirt cheap and easy to buy. You can add GM EOS “88862587”, if you like. I run Rotella in all my junk, it works fine. However, I also run small streetable cams and don’t let any engine sit there and idle all day. Spend a few dollars on any decent set of cylinder heads and you won’t have to go crazy on your cam selection. And rpm levels. And you just solved most of your durability issues.
 
461 - 480 of 495 Posts
Top