No, it is not. Use exactly what the manufacture recommends. What good reason would you have for doing otherwise?
That depends on the make, model, and engine size of the vehicle.
You should use Suzuki's 10W 40, but it is safe to use another brand of 10w 40 as long as it is a motorcycle motor oil. You will need an oil with wet clutch protection.
10w-30 or 10w-40 oil
10w-40 ATV oil for wet clutches is always a safe bet for quads.
The manufacturer recommends a 5W-30 oil. Any name brand is fine. A 10W-30 or 10W-40 will also work just fine in your vehicle.
10W-30 weight oil is recommended for your 2000 Kia. If the vehicle is operated in extreme climates you can use a heavier motor oil.
Hyundai Motor Company recommends 10 W 40 engine oil in the Tucson model vehicle. 10W-30 motor oil can be used in the vehicle for use in cold climates.
iF YOU ARE REFERING TO OIL FOR A VEHICLE IT REFERS TO THE DENSITY OR WEIGHT OF THE OIL. AS AN EXAMPLE YOU CAN BUY 10W-30. nOT SURE IF THIS IS WHAT YOU ARE ASKING IF NOT GIVE A LITTLE MORE INFO.
You will be safe with 10w-40 ATV or motorcycle oil designed for wet clutches.
Suzuki recommends the use of SUKUZI PERFORMANCE 4 MOTOR OIL, or an oil which is rated SF or SG under the API classification system. The viscosity should be SAE 10w-40 if a 10w-40 isn't avalible 10w-30, 10w-50, 15w40, 15w-50, 20w-50 can be used depending on the temprature. I would stick to 10/15w 40/50 to be safe.
Yes
The Yamaha Bear Tracker takes 1.6 quarts of oil at each oil change and a K&N filter is recommended by Yamaha. The Bear Tracker takes 10w-30 or 10w-40 weight oil depending on the age, size, and weather conditions where the vehicle is kept.