Uh, guys......the API folks (American Petroleum Institute.....they work along with the EPA to regulate automotive emmissions standards, etc.) took most of the extreme pressure zinc additives OUT of automotive oil a couple of years ago because it was causing problems when it got past the rings and into the catalytic convertors. Many automotive manufacturers immediately began seeing problems, especially European flat-tappet cam engines. One guy completely wore out a cam in 1,000 miles on the new oils. Some diesel oils are better, but even they have reduced zinc dialkyldithiophosphate in them. That zinc additive is one of the better EP (extreme pressure) additives you can put in an oil for load-carrying capabilities.
Our engines NEED at least some EP additives. The newer automotive oils have practically none!!!
THAT, my friends, is why racing oil is so much better than Wal-Mart oils. Choose a GOOD racing oil.....one WITH additives made for load-carrying.....and you will see vast improvements in wear reduction, and extended intervals between needed rebuilds. Racing oils don't have to comply with EPA or API standards. Automotive approved oils do!
Keep all of that in mind when trying to choose a cheaper oil.
FWIW
- Craig -
Cramac Tech Support
