Harley Davidson recommends it (Citco I think) but No!!! Just use the correct weight for your motor, time of year and how you ride it!
2004 fatboy oil change
20w50
Sunoco, makes Harley Davidson engine oil
Recommended oil is 20w50
Just bought a Harley....what weight oil is recommend for this bike. Also, how many quarts does it hold?
4 with filter
The Harley Davidson Dyna is one of the motorcycle company's newest models. According to Harley Davidson, the specifications for the Dyna show a dry weight (this means it does not contain fluids such as oil and gas) of 639 pounds.
No.
One quart (32 ounces).
Depends on the model. Generally three for cruisers and four quarts for touring bikes.
amsoil 10w 30 the best money can buy