Question about Harley Davidson FLSTFI Fat Boy Motorcycles
Your bike came with H-D Syn 3 , 20W50 synthetic oil from the factory. You need to stay with 20W50 oil unless you live in some extremely cold or hot climate. For ambient temps running anywhere from 0° F. to 100° F., 20W50 is fine. You can use either petroleum based or synthetic oil. Other brands of oil that you can use are Mobil V-Twin, Amsoil, Revtech, and many others but go online and check for each manufacturer's recommendation. Harley says that you must use an oil that is rated for use in diesel engines due to the high pressure additives that these oil contain.
Posted on Apr 04, 2011
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Posted on Jan 02, 2017
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