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BikeMaster 10W-40 Full Synthetic Oil

For bikes that actually get ridden

If your rides aren’t just weekend parades — heat, traffic, long pulls — you need oil that behaves, not surprises you. BikeMaster 10W-40 Full Synthetic is aimed at four-stroke motorcycles and powersports machines where the engine, clutch and gearbox share lubrication. Keeps the clutch working like it should and doesn’t turn thin when the temps climb. Available sizes: Quart, Gallon — handy whether you’re topping off one bike or doing multiple services.

Real-world notes (what you’ll notice after a change)

  • Stays put at operating temp, so shifting and clutch feel don’t change mid-ride.
  • Full synthetic base helps cold starts; fewer nasty dry-start grinds on short trips.
  • Formulated with clutch compatibility in mind — no slick additives that make wet clutches slip.
  • Holds up to shear in shared-sump transmissions; important on bikes that eat oil when pushed.
  • Practical packaging: quart for single services and top-offs, gallon if you do multiple bikes or want less wasted trips to the shop.

Quality & formulation

Blended for motorcycle use where applicable — the additive mix balances film strength, gear protection and clutch-friendly friction. Performance can be vehicle specific, so check your manual if you run something unusual.

FAQs

Is this safe for wet-clutch motorcycles?
Yes — it’s formulated for shared-engine/clutch setups and won’t add the slippery friction modifiers that cause clutch slip.
Can I use it in air-cooled engines?
Many riders do. 10W-40 full synthetic is a common choice for air-cooled fours when the manufacturer allows it.
Quart or gallon — which should I pick?

3 reviews for Bike Master Full Synthetic Oil

  1. Mark

    Changed my whole fleet over to this synthetic and the engines run cooler and smoother. Great value for full synthetic.

  2. Reid Wilson

    Clean oil that flows great in cold mornings and holds its viscosity in summer heat. Very happy with performance.

  3. Michael P

    Good quality full synthetic at a fair price. My transmission shifts noticeably smoother since switching to this.

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