I did a search through the site to see if this subject had been touched upon but didn't find anything. You can go to all kinds of sites for this but I trust the people here for info. I have thought for the longest time about switching from regular oil to synthetic but always figure...naaaa... and buy my same old Quaker state. What are some of your thoughts on this, can I just drain the pan and swith over to synthetic? Does it make a world of difference?