would this oil be ok to use in a blaster tranny? im not going to use it in the blaster but i am going to use it in my kx 80 if its ok. the kx 80 manual recomends 10w 40 and thats what i got. is this stuff ok? Pennzoil Conventional
Here is the deal:
Gears like the thickest (read high viscosity) oil for shear strength to prevent metal to metal contact, but the thick oil sucks up horsepower.
Roller bearings and unpressurized plain bearings like a medium viscosity oil to balance flow with film strength.
Clutches like a thin oil. The thinner the better, with no anti-friction additives.
Seals, especially worn out or damages seals or seal surfaces, leak the least with the thickest oil.
Gearboxes typically do not collect much water, like engines do, so water dispersants and detergents are not so necessary.
Better to have water and metal bits fall to the bottom.
So what is the best oil for a 2 stroke gearbox?
Manufacturers like Motul and Ipone have come up with excellent oils that are specific to 2 stroke needs. If you ride hard, buy them!
Otherwise think about your needs.
Leaky seals? 15w40 or 20w50 will get you by but are hard on your clutch.
Lots of power or weak clutch? ATF, especially Type"F"ATF does the clutch well.
What about regular 5w30 or 10w30 motor oil?
The additive package is terrible for the clutch. Will ruin it.
15w40 is made for diesels, but is still an engine oil, not a gearbox oil.
Repair your leaky seals. Go to the motorcycle shop, buy a specific 2-stroke gearbox oil.
Or use ATF (Auto Trans Fluid), especially type "F" if you want your clutch to survive.
Steve