I own a 91 Suzuki 160 Quad Runner and gas keeps getting into my oil. Does anybody know what cause this and how it can be fixed. Any help would be greatly appreciated.

 

Sounds to me like your machine is flooding. Check your throttle play first, I have had that problem before. The next thing that it might be is varnish. Your machine being as old as it is might have varnish in the carberuetors. You will need to either run a tank full of fuel stabilizer treated gas through it or ,if it is really bad, you will have to remove the carb and clean it, possibly repacing the jets and needle. Your oil is obviously no good now so replace it and the filter if it has one. If you have had this happen too many times your crank may be scored, and your bearings may be shot. Think little problems first, that is usually where the problem is.