Kicking the idea around but my build is a long way from being done. I've got a 468/TH400/4000 converter that I might try to run a Gear Vendor's overdrive behind. I'm sure it's going to create a lot of heat and if the compressor oil has been found to stand up the best just curious how it works long term on the street.
I know there was someone on this forum that's been using it but can't remember who.
We've been using the Amsoil Compressor Oil for three years now in the race car. It's a synthetic that has very high flash points and has no friction modifiers. Several converter/trans vendors recommend it. They make it in several viscositys but we run 20wt. It's clear and oderless which is nice. I buy it by the 5 gallon pail which really cuts down the cost. I would highly recommend it for any high performance applications. http://www.amsoil.com/storefront/pci.aspx