Oils & Oil Filters

Oils & Oil Filters

Oil breaks down fast in an air-cooled V-twin running hot in stop-and-go traffic — a lot faster than most riders assume. What’s in this category is picked with that in mind: full synthetic and synthetic-blend oils built to handle the heat cycles and shear stress that motorcycle engines see, not repackaged car oil with a different label.

You’ll find Motul’s 8100 X-CESS Gen2 5W40, a full synthetic built around modern engine tolerances, alongside Red Line’s Big Twin PowerPack and Twin Power’s 20W50 synthetic and premium lines — both long-time staples for Harley Big Twin engines that need a heavier weight to protect the clutch and transmission sharing the same oil supply. There’s also FOX suspension fluid in here for shock and fork service, since that’s routine maintenance too, just for a different part of the bike.

Getting the weight and spec right matters more than brand loyalty — running the wrong viscosity in a wet-clutch engine can cause slipping, and it’s not always obvious until you’re already feeling it. If you’re not sure what your engine calls for, check your owner’s manual before ordering, or reach out and we can point you in the right direction.