API classes

[will_gurt]

This is really going to sound stupid, but here goes. What does the API rating in oil mean? I was looking for API class SE or SF. The closest I could find is SG. What are the differences? Would putting the wrong API index oil in hurt the engine?

[xkvator]

Will...the SF/SG rating was from a couple years ago...SL is what's on most of the top brand gas engine oils today. the newer ratings have improved performance/anti sludge additives. as long as you use an oil that's rated higher than what your vehicle listed, there shouldn't be a problem. you can get more info from www.api.org, etc.

[will_gurt]

xcavator,

Thanks for the information. The information on the website is quite helpful.