Product Reviewed: 0W-40 Formula 4-Stroke® PowerSports Synthetic Motor Oil (AFF)
Current Rating: 4.93 out of 5 stars
Votes & Reviews: 65 vote(s) and 60 user reviews.
Reviewed by David: 
I used this oil in all 3 of my machines and change it yearly and never no issues just change the filter
Reviewed by Marc:
I use this in my Can Am Commander Max. It helped quiet the engine immediately and makes it run smoother. After 100 hours of use, the oil looks like I had just put it in the motor. The engine starts easier and runs smoother. I used Amsoil in every motor I have, including my Indian motorcycle.
Reviewed by Steven:
My Polaris 570 Sportsman will now start at -27F. Warms up much quicker than with the standargd Polaris oil. my Honda rubicon 500 runs even better too.
Reviewed by Randall:
For my turbo RZR
Reviewed by David:
I've used this for years in my side by side and quad works great
Reviewed by James:
I have Amsoil in all my gas engines! I've using Amsoil for more than 20 years. Never had any problems or failures..
Reviewed by Richard:
Great product at a fair price!
Reviewed by Lucien:
I used this in my Yamaha Warrior over the suggested yamalube. This is hands down the best oil you can run. Engine
sounds better.
Transmission shifts like a dream. Clutch feels amazing. My ATV did not perform like this on reg oil. Even starts easier since the change over
Reviewed by pete t.:
I have been using Amsoil Products for years in all my applications, The research and testing is what always keeps me confident that i am buying the best protection that i can.
Reviewed by Northwoods:
Always please with products!
Reviewed by Jimbusy:
I use this in all of my small equipment 4 cycle engines. They run smooth and are easy to start even when it's below freezing, which can happen here any day of the year.
Reviewed by Bear:
I have a small shop,and I run this oil in a number of 4 wheelers,side x sides,and snowmobiles,But I sometimes find it hard passing the price onto the customer as they find it a bit pricey
Reviewed by Honda guy:
I only use Amsoil in all of my machines.
Reviewed by Falcon:
I use this oil in my 750 brute force, easy starting, runs a lot cooler.
I use amsoil in every vehicle I own.
Confidence that my engines are well protected.
Reviewed by Road Dog:
Awseome product....stuff was like unbelievably slick and my Honda ATV sounded so smooth after the oils change...
Reviewed by Hannibal:
My 2002 Honda 450 Foreman S is 16 years old and runs like a new atv. Amsoil Formula 4 stroke oil keeps my bike working like new and still is a bike you can depend on everyday.
Reviewed by Pickle:
Placed this in the wheeler and it works great. Seems to start easier in the cold weather.
Reviewed by Dieseldog800:
I have been using this oil in our four wheelers and UTV for years. I very satisfied with the product and how it protects engine components even during the hottest of summer days.
Reviewed by REB:
My atv has never seen any other oil from it's first oil change until now and it runs like new, it's a 2000 500 atv
Reviewed by Whododgeit:
It good oil and running engine for life
Reviewed by MtnDsrtMnQ:
I purchased this oil for our Quads in an effort to move to "One Brand" of oil, for all of our machines. After very successful use in our diesels, it was a given. AMSOIL-the first in synthetics, work hard in their R&D program, I trust AMSOIL.
Reviewed by Stan:
I my car motorcycle side by side can Am Titan Toyota love your oil and filters.
Reviewed by Mike DIY:
It is nice to have one product that works for many manufacturers and works better than OEM
Reviewed by Billy:
Good stuff and i trust it.
Reviewed by Daryl:
Really made my engine purr in the old 4wheeler! Runs way smoother!
Reviewed by Rob:
I run my ATV very hard. I want the best engine protection I can get.
Been using Amsoil for years . With great results
Reviewed by Ken:
Have heard of Amsoil for a very long time. Just prior to this desert season. I bought a 1 year subscription and purchased a bunch of different products for the quads and Rzr. I have been very pleased. My sons quad always overheats and shuts off usually once a trip. Hasnt happened since I have been using Amsoil. I will renew my subscription and use this stuff every season.
Reviewed by Becker:
We use amsoil in our automobiles (cars & trucks), motorcycles, all 3 4-wheelers, 3 snowmobiles.
Reviewed by Thetorque:
I started using this product in my 2003 Polaris 330 Magnum.
Reduces heat and provides the startup lubrication I wanted.
Reviewed by snakesc:
We use it in our 4wheeler YFZ450 with exceptional results, no wear whatsoever.
Reviewed by Mulie:
Use in my wheelers and side by side. As well as generator and mower. Makes them run both cooler and quieter.
Reviewed by
JC:
I'm currently running this in my defenderxt hd10. Works great.
Reviewed by Jake:
Works great having the product shipped to my house
Reviewed by Madhunter73:
I recently switched to Amsoil i use it on everything i have that uses oil and would never use anything without Amsoil name on it!! i just recently purchesedFormula 4-Stroke Power Sports Synthetic Motor Oil
for my 700 Yamaha Grizzly and am highly impressed so far, you barely can read the dipstick after some serious riding for
the money and if your looking for Quality first rated oil look no futher than Amsoil!
Reviewed by Matt Phillips:
Been using it since I bought the bike
Reviewed by Renegade:
Been using it since I bought the bike
Reviewed by Pauly:
I use this 0-40 oil in my turbo snowmobile.
Knowing it's excellent protective properties, I never concern myself with engine issues. Sled now has 11000 miles on it and runs as good as the day I bought it.
Reviewed by Eliminatorxp30:
Haven't had any issues with amsoil. Use it for everyday day vehicles to my grease gun. I even use the 75/110 gear oil in bravo 1 out drives on my boat. Each engine dynoed at 650 hp, the drives are rated for roughly 450 hp. Had a guy go through them since I've never done anything with them , he says "keep doing what your doing" I believe in this product and I highly recommend from, boats to vehicles to snowmobiles.
Reviewed by Howards911:
Lost my water pump and didn't realize it until I was overheating. Thanks to this great product I didn't damage my motor. Great oil that provides great protection.
Reviewed by SB:
I have used amsoil for many years and have never been disappointed.
Reviewed by Warrior99:
Good for cold start ups in winter and cools motor down in the heat of summer
Reviewed by Schenbiro:
I use all year round!
Reviewed by Brbstafford:
Makes our ArticCat 4Wheeler run some, quiet and cool, just like all Amsoil products. This is the only oil we will put in our ATV.
Reviewed by Turtle Man:
This is the only know oil that meets the requirements of motorcycles that has the JASO clutch additive and is a 0w-40 viscosity. Providing faster oil pumping at startup and covers a wider temperature range of use in cold weather than the 10w-40 motorcycle oils. Continued customer of this from Amsoil. Thanks greatly.
Reviewed by ResQU:
In the winter, I put this in my 2014 BMW K1600GTL. BMW recommended their 5-40w which is good too, however this Amsoil has a better rating and the lower viscosity allows for quicker pick up and I can actually hear the difference in the followers. In the summer I'll run Amsoil's Metric Motorcycle.
Reviewed by Camel Killer:
Run this in my son's ATV, and have influenced many many friends to switch to this oil in their ATV's, UTV's, and watercraft.
There is no better, period!
Reviewed by Sand dune master:
I use this oil in all my atv's
Reviewed by Jackson:
I use this in my 07 Rincon and it shifts better and runs cooler than any other oil I've used prior.
Reviewed by Cooter:
It what I need.
Reviewed by Jeff:
Great oil. Been using this oil for many years. Run this in the cmax for 15k with their filter, not a drop used!
Reviewed by Frederick:
Outstanding protection all year round !!
Reviewed by Robert:
Yamaha apex
Reviewed by MICHAEL:
Trx 650 rincon trx 300 easy start cure rincons cold shitfing
Reviewed by Joshua:
I have amsoil in every motor I own. The formula 4 is great stuff. I have it my 2016 renegade 1000xxc and my Honda rubicon.
Reviewed by Gaza:
Being using it the mini van for years
Reviewed by Michael:
I use this in 2016 BMW 1200RTW starting is great when it gets colder, and the gearbox shifts real nice
Reviewed by Chris:
This is an awesome product
Reviewed by Martin Mercier:
J'ai commandé directement via ce site car après vérification, il m'a été impossible d'en trouver chez les commerçants locaux.
J'utilise cette huile dans mon VTT Honda depuis son achat. Démarrage très facile en toutes conditions et performances
incroyables.
Merci à vous, j'ai reçu le tout très rapidement et la transaction fut traitée comme je m'attendais, aucun accrochage.
Re: Produit incroyable et service #1
Martin, thank you for posting this review of both the AMSOIL product you are using as well as the service you have received. With a pour point of -51C, AMSOIL AFF will perform well in your Honda ATV in the cold winters as well.
Replied by Tech Admin
Reviewed by Phil:
I use AMSOIL 0W-40 in my 3 and 4 wheel quads. Both see rough service from myself and my sons. AMSOIL always protects and gets us back home.
Canada
United States
Runs smoother
Friends quad ran so much smoother with this oil. He loves it, and said it ran quieter too.