4-Cycle Motorcycle & ATV Oil
0 results found
No products match your current filters
Try the following
- Remove some filters to broaden your results.
- Clear the vehicle filter to see all available products.
- Check a different category or manufacturer.
- Browse the top categories below to find what you need.
Why 4-Cycle Motorcycle & ATV Oil Matters
A four-stroke motorcycle or ATV engine is a remarkably compact powerplant that asks a lot from its lubricant. Unlike a typical car engine, the oil in a 4-cycle powersports engine must simultaneously lubricate the engine internals, protect an integrated gearbox, and — in many designs — engage a wet clutch, all while enduring extreme heat, high RPM, and demanding duty cycles ranging from highway cruising to full-throttle off-road abuse. Using automotive engine oil in these machines is a common mistake: car oils often contain friction modifiers that can cause a wet clutch to slip, reducing power transfer and accelerating clutch wear. Dedicated 4-cycle motorcycle and ATV oil is specifically engineered to satisfy all three jobs without compromise.
What to Look for When Choosing 4-Cycle Oil
- JASO MA / MA2 Rating: The Japanese Automotive Standards Organization (JASO) MA and MA2 ratings certify that an oil is compatible with wet-clutch transmissions — always look for this on the label.
- Viscosity Grade: Common grades include 10W-40, 10W-30, and 20W-50. Your owner's manual specifies the correct range for your engine design and operating climate.
- Synthetic vs. Conventional: Full-synthetic formulas offer superior film strength, oxidation resistance, and performance across a wider temperature range than mineral oils — particularly valuable in high-revving or air-cooled engines that run hotter.
- Air-Cooled vs. Liquid-Cooled: Air-cooled engines (common in cruisers and many ATVs) place even greater thermal demand on the oil, making shear stability and heat resistance critical selection criteria.
- API Service Rating: Look for API SN or higher, which ensures modern additive chemistry compatible with catalytic converters and emission controls.
Top Brands in 4-Cycle Motorcycle & ATV Oil
Royal Purple is one of the most recognized names in high-performance synthetic lubrication. Their Max-Cycle line is formulated with Royal Purple's proprietary Synerlec® additive technology and is rated JASO MA2 — the highest wet-clutch compatibility rating — making it a go-to choice for riders who demand both peak protection and clutch performance.
Liqui Moly brings decades of German engineering to the powersports market. Their 4T motorcycle and ATV oils are fully synthetic formulas developed and tested on racing machines, offering excellent engine cleanliness, friction reduction, and protection under extreme off-road operating conditions — with options specifically tailored for ATVs, quads, and side-by-sides.
Klotz Lube has been a trusted name in racing lubrication since 1959. Their MX4 TechniPlate line delivers 100% synthetic race-inspired protection for four-stroke dirt bikes and ATVs, with advanced polymers designed to reduce operating temperatures, improve valvetrain protection, and boost bearing load capacity beyond OEM specifications.
Motorex is a Swiss-engineered lubricant brand with a long history in professional motorsport, including partnerships with top motocross and enduro racing teams. Their 4-cycle motorcycle oils are formulated to handle the rigors of both competitive and recreational riding across a wide range of conditions.
Motul is a globally respected French lubricant manufacturer with one of the broadest 4-cycle powersports oil lineups available. From the flagship 300V Factory Line with ESTER Core technology to accessible Technosynthese semi-synthetic options, Motul covers everything from weekend trail riders to professional racers — all with JASO MA2 certification and full wet-clutch compatibility.