Use a fully snythetic oil. If your having issues when hot I'd got to AMSOIL. They have the best additive package in the busniess bar none. I put it in my son's 50cc honda knock off with a wet clutch cvt trans and it's a different bike now. Runs cooler, starts faster and runs longer on a tank of gas and does not lug down as much with my 230 plus lb butt on the seat. PM me and I'll get you a deal on a few qts or a case if you want to try Amsoil out. That goes for any fourm member that does not have an Amsoil dealer they use on a regular basis.

 

Check out Spectro Oils. They are a well-known name that have been around for awhile.

 

I totaly agree. Amsoil's additive package is second to none. I know this is off subject but, I use if in my autos also.

 

is it ok to use yamalube SAE 10w-30/API SJ in my polaris predator the local dealer told me its the same thing as polaris oil ps-4 but is it

 

I wouldnt use the 10w30 oil. THe pred runs to hot and needs a 40 based oil. The polaris oil is a 0w40 or 10w40 oil.

 

Polaris PS-4 is 10w-40. I use amsoil 0w-40 in my predator. Next oil change I am going to use yamalube 10w-50.