10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)
Outstanding Protection for Scooter Engines, Transmissions and Gearboxes. Meets the needs of today's high-tech air and water-cooled four-stroke motorized scooters. Unsurpassed wear protection and friction reduction for longer equipment life. Protects transmissions and gear boxes. Wet-clutch compatible to insure smooth clutch operation. Provides long-term protection during storage.
Product Code: ASO •
Brand: AMSOIL
Product Details
Tech Data
Reviews & RatingRelated Videos
Product Applications Product Application Specs • API SG, SL/CF
Product Description
Shear Stability
Thermal Stability
Transmission and Gear Box Compatibility
Wet Clutch Compatibility
Rust and Corrosion Protection
Service Life
Mixing AMSOIL HEALTH & SAFETY Click here to view the MSDS Data Sheet for AMSOIL ASO. Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
Tips to Effectively Winterize Gasoline Powered Vehicles & EquipmentAlso use AMSOIL Gasoline Stabilizer, in addition to fresh Oil & Filter Reviewed by johnny: amazing stuff cleans last longer runs smoother better mpgamazing Item Reviewed: 10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)
Reviewed by Rickiboy: Best oilVery good quality Item Reviewed: 10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)
Reviewed by The repair guy: Been using for 5 yearsI use this oil in my Yamaha majesty 400 amd my Kymco Xciting 500ri. Change it every spring. Never any problems,smooth running engine,no noise,no leaking! You have an exellent product! Item Reviewed: 10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)
Reviewed by Larry: Very good oilMy wife talked me into buying 2 scooters to putt around the countryside. They are only 49cc engines but since I changed the oil to synthetic they picked up a few miles per hour. I believe synthetic oils are great for any moving metal parts. No wear, No friction, saves money in years to come and makes my engines very dependable. Item Reviewed: 10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)
Reviewed by Jean-Michel: Amsoil oils reviewI have used Amsoil oils for the last 15years on all my toys. Never had a problem. These oils are prime quality at a reasonable price. Item Reviewed: 10W-40 Formula 4 Stroke® Synthetic Scooter Oil (ASO)
Reviewed by Kenwood: The only oil for my mower!I bought a new riding mower and wanted the best oil I could find for it. I found the Formula 4 Stroke small engine oil and liked the fact that it was specifically designed for small engines. This year has been very hot and the grass has grown like crazy so the Amsoil has been put to the test and passed with flying colors. This is the only oil I will put in my mowers from now on. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by W: No turning back!! Love this oil!!My mower runs cooler/ quieter and since this oil I don't ever have to add oil between cuts. It's worth Every penny!! Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Jack: ExcellentGenerator Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by PB: Quality alternative/peace of mindI use the formula 4 stroke in all my small engine equipment: pressure washer, lawn mower, engine-driven air compressor, brush mower. I feel it's a quality alternative to brands at local parts stores and it gives me peace-of-mind for longer oil change intervals and severe duty service-just as intended. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Shakey: I would buy this product againI bought a new Exmark 24hp Kawasaki engine got 300 hr on it already change it ever 50hr so far not been a hair below full at 50hr yet 👍🏼 Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by WD: Best warm weather oil for outdoor power equipmentWe use Formula 4-Stroke in our commercial lawn mowing business...45 deg F to 100 deg F. It is proving a great oil, no consumption, engines still running like new, and the oil still looks fresh at the OCI. At the 10w rating, it will be fine for cool weather mowing. I'd use the 0w40 formula for severe winter OPE use. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Big guy: Great product keep Small Engines running cleanUsing on small engines generators lawnmowers and snow blowers Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Northeast Homeowner: Great small engine oilI use this oil in my 36 inch walk behind mower, the snow blower and a permanent outdoor standby generator. These small engines are still full on the dipstick at their annual oil changes and the oil looks clean. All of this power equipment is now 10 years old and they are still going strong. Thanks for making such a great product for small engines. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Leonard: I have purchased several timesTypical high quality Amsoil product. I use it in my 3 mowers. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by None: The oil is second to no other brand.I use a soil in all my lawn and garden Equiptment , very happy with it ,without a doubt the best oil there is, Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Steve in Tennessee: Excellent protection, as you would expect!I use this oil in my walk behind mower & lawn tractor. One change through the season with about 50 hours on the work horse lawn tractor & the oil is still still clean, I almost feel wasteful when I change it. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by Brian: repeat buyer of this oilI use this oil in riding and push mower with no problems and know its of the same quality as the automotive oil. I've found Amsoil to be a very reliable especially when I lived in the midwest and will continue to run Amsoil is all my vehicles. I give two thumbs up to the Z-Rod oil as well my '62 Galaxie sure likes this oil. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
Reviewed by JCD: Best small engine oilHas treated me well in all 4stroke small engine equipment for over a decade. Have a 10+ year old power washer, generator, and lawn mower that are still running as good as new. Item Reviewed: Small Engine Motor Oils (ASO,ASE)
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Reviewed by Shaun :
Best scooter oil
I have been using this in my 06 Yamaha Vino 125 Cold starting no problem no rough idling everything runs smooth been using it for one year engine temperature for air cooled motor has been extremely improved compared to mobile one Castro royal purple you know the cheap stuff