I use honda 4-stroke motor oil in my raptor. I bought another quart today because I have to open up the side case and I will lose oil. I bought the same oil as always, but the rating went from 10w 40 SG/SF to 10w 40 SJ....... What is the difference? Can I mix it with the SG/SF thats left in the engine or should i drain it al and use all SJ? Thanks

 

I think you will be ok. Those are standards. Stay away from energy conserving letters if you ever switch to using automotive oil due to clutch slippage.

 

API ratings come two ways. The "S" rating indicates service and is usually meant for normal passenger vehicles. The "C" rating indicates commercial and is meant for rough, extended-use vehicles like taxi cabs and trucks. Each API rating comes with another letter to indicate how well it performs. SA represents the lowest service rating for passenger vehicles, and CA represents the lowest rating for commercial vehicles. At present, the API rating for the highest rated oil is SG and CE. But remember, you have to consider what conditions you are running your vehicle under. For example, if you are racing your engine, or running under high demands, like off-road driving, you might want to consider the "C" rating instead of the "S."

 

That SJ Covers everything before it such as SA SB SC SD SE SF SG ect all the way until SJ.

 

Cool, thanks guys, that helped alot!