The oil to use in a 2002 Montana depends on the climate. In summer, use a 10-40 wt oil. In the winter, a 10-30 wt or even a 5-30 wt is alright.
30 wt
30 wt oil
IF it is virgin olive oil it will be fine.
Most small engines use Sae 30 or 10w 30.
The Craftsman 6.0 Mower takes an oil that is at least 30 wt. A blended oil that is 10-30 is okay to use also.
30 wt of a good brand if it is a Briggs or Tecumseh.
5 w 30 is recommended but I use 10 W 30 for extra lubrication its better for the motor
Depends on your fork setup, rider weight and your riding ability. Fork oil is available from 5 wt (thin oil = quick action) to 30 wt (heavy = slower action)
Any weight is better than not any oil! but if youre shopping , i used a 30 weight Valvoline winter, 50 wt in summer, straight 30 or 50, I drove trucks 15 years at a company full of different diesels! they only had 30 wt, until ur Detroit 2 stroke 8V92 drivers complained and got 50 wt for us.
I use a synthetic oil called royal purple 5-30 wt it is better for your engine but costs a little more
Your "operators manuel" should explain which type of oil to use. I have a 96 Buick, LaSabre, that uses 10/30 wt.