• Yamaha recommends only certain kinds of fuel for the Grizzly 660.fuel station image by AGITA LEIMANE from Fotolia.com
  
  Yamaha had been manufacturing ATVs for 18 years when it released the first Grizzly utility quad in 1998. Designed for performance, power and driver comfort, the original Grizzly came out with a 600-cc engine, the only Yamaha ATV to feature that displacement. Over the years, this displacement has changed. The final year that a 660 cc Grizzly was available was 2008.
  
  

Gasoline

• The Grizzly 660 takes gasoline as its main fuel source. Yamaha instructs owners to use only unleaded gasoline in this quad, warning that leaded gasoline will cause severe damage to piston rings, valves and the exhaust system. Unleaded gas with a research octane rating of 91 or higher is recommended. Gasohol may also be used if the ethanol or methanol does not constitute more than 10% of the fuel. The Grizzly 660 can fit 5.28 gallons of gas in its tank, with 0.92 gallons in the reserve.
  
  

Engine Oil

• Yamaha recommends that riders check engine oil levels prior to each ride. Four different types of engine oil work most efficiently in the Grizzly 660: YamaLube4, SAE5W30, SAE10W30 or SAE20W40. Still, any API service SG or higher type of engine oil may be used. The Grizzly 660 has an engine oil capacity of 2.01 quarts.
  
  

Gear Oil

• Yamaha recommends SAE80 API GL-4 Hypoid oil for both the final gear oil and the differential gear oil. The Grizzly 660 has a final gear oil capacity of 0.26 quarts and a differential oil capacity of 0.30 quarts.