GM recommends 10w30 for driving in temps above 0 degrees, and 10w40 in extreme heat.
You should use 327ci 300hp 1966 Corvette engine oil ;)
motor oil 10w30
You can use Mobil 1 if you desire, but you can also use conventional oil.
The motor oil to use in a 1982 Yamaha 250 XT 4-stroke dirt bike is a 10-30 or 10-40 weight oil. Castrol GTX Motor Oil that is of this weight is the best oil to use in off road bikes, because it is a cleaner oil. It will not gum up the works of smaller engines like regular motor oil.
Valvoline premium conventional 5 or 10w30
i use synthetic oil,it doesn't break down like regular 10w30
Castorl GTX is a good oil that will not break down clutch plates and is relatively cheap. a good 10-40SAE weight oil will do great, as motorcycles need slightly thicker oil than cars.
Mobil 1 synthetic.
Polaris has their own special "fork oil". 7.5 weight is equivalent to polaris oil or use a 10 weight to improve dampening.
What oil weight does a 2001 yamaha raptor 660r use
hd 30 weight oil of your choice.
Always use the Honda brand oil. 10-40.