This Genuine Motor Oil 15W-40 Full Synthetic is a JASO MB 4-stroke oil built for the way scooters really run: small, air-cooled engines spinning at high RPM in stop-and-go traffic. Made in the USA, JASO MB delivers the highest lubrication ability of any 4T oil in the class, so your engine gets maximum protection whether you're commuting across town or holding full throttle on a hot summer day.
Why Oil Matters More in an Air-Cooled Scooter
Most scooter engines have no radiator or coolant. They rely on airflow and, just as importantly, on engine oil to carry heat away from the piston, cylinder, and crank. When oil thins out or breaks down from heat, wear climbs fast. A full synthetic JASO MB oil holds a stronger oil film at high temperatures, keeping air-cooled engines protected when they run hottest.
Key Features
Maximum lubrication in the 4T Oil class: Low-friction JASO MB formula with the highest lubrication ability of any 4T engine oil
Built for air-cooled engines: Full synthetic 15W-40 holds its film strength under high heat, where air-cooled engines need it most - so slick it's not suitable for use in wet-clutch engines.
JASO MB certified: Registered to JASO T903:2016 (MB), the right spec for automatic (CVT) scooters with a separate dry clutch.
Universal 4T fitment: Works in most 4-stroke scooters, from 50cc GY6 to 200cc+.
OEM recommended: Genuine Motor Oil is the brand recommended oil for Genuine scooters and motorcycles. All oils are formulated for maximum engine protection and longevity with any brand vehicle.
Made in the USA: Blended and bottled in the United States.
Technical Specifications
Part number: 1400-1087
Alternate reference: 90798
Viscosity: 15W-40
Type: Full synthetic, 4-stroke (4T)
Certification: JASO MB (JASO T903:2016), registration M001GEN001
Volume: 1 U.S. quart (946 mL)
Country of origin: USA
Brand: Genuine Motor Oil
Compatibility
Use where your owner's manual specifies SAE 15W-40 and JASO MB. Confirm the requirement for your exact model and operating conditions.
Application
Examples
Four-stroke CVT scooters
Compatible scooters requiring 15W-40 JASO MB engine oil
GY6 engines
50cc (139QMB) and 125/150cc (152QMI, 157QMJ), including compatible Tao Tao, ZNEN and other Chinese GY6 scooters
Genuine
Brio 50i; Buddy 125/150/170i; Buddy Kick 125; Hooligan 170i; Rattler 125/200i; Stella Automatic; Urbano 50i/125/200i; Venture 50, where specifications match
Royal Alloy
GT150 where specifications match
Chicago Scooter Company
Bella Classic 50; Nitro Sport 50; Pug 50 where specifications match
Kymco and SYM
Four-stroke scooters requiring 15W-40 JASO MB
Not for two-stroke premix or oil-injection systems. Do not use JASO MB in place of MA or MA2 oil required by a wet-clutch engine.
Shop Genuine Motor Oil
Choose the viscosity and service specification required for your vehicle.
Follow your vehicle's oil-change schedule, including severe-service intervals for heat, heavy traffic, or sustained high-speed riding. The quart bottle is convenient for routine service and measured top-ups. Measure each fill to your vehicle's specified capacity; one bottle is not a universal fill quantity.
Same day shipping for orders placed before 2PM (CST) M-F
30-day return period on eligible items
Flat-rate shipping for orders shipped to the 48 Contiguous United States.
