Welcome to the forum. What size of motor do you have and is it a 4x4. You can go to the AMSOIL Product Lookup Guide and check out some recommended oil, oil filter and spark plugs. For the motor you need to make sure the oil is wet clutch compatible so don't just use regular car oil. I would recommend the Formula 4 - Stroke Oil. It is an excellent synthetic oil and is wet clutch compatible. I am not finding the differential fluid in my book I believe it will take 80w - 90.