Customer Ratings & Reviews

My mechanic said it what he uses.

the satisfaction of knowing my bike is getting the best protection on the market is great piece of mind. after coming home from a 1700 mile trip and being stuck in multiple traffic jams in 95 degree weather and the bike being very hot Amsoil kept it protected. I run Amsoil in everything i own .

The two issues with my H-D are oil temp., foaming and lost surface tension. Lucas and Mobile 1 aren't as good as Amsoil.

Great product, with super fast shipping.

Excellent product - use it in all the toys. Fast shipping and great value for preferred customers.

After researching and watching “The Motor Oil Geek”, in which ~40 oils were reviewed, the Amsoil 5W30 diesel Dexos II was the clear winner. I use this in my 2025 GMC Denali XL Ultimate with the 3.0L Duramax. As a former engine development engineer for a major equip mfg I’ve studied, reviewed thousands of oil analysis reports and have a lot of experience a with oils, their additive packages and lubrication systems. My Caterpillar SOS (oil analysis) shows the Amsoil 5W30 retained 11.3 cst@100C after 5000 miles whereas the GM 0W20 oil was at 8.2 cst@100C. I will continue to monitor ever 5000 miles. Start up idle - silky smooth, normal operating - oil pressure is maybe 1-2 psi higher than factory oil. I’m planning on 200,000 miles in 10 years with a perfect engine!

Great product, inexpensive and bike runs great!!

Oil is the best you can get, I noticed a cooler and smoother running engine right away on my Harley electra glide

My Riad sling has 202000km and I’ve used AMS oil since it had 10,000km. engine loves it. Never touched a bolt on Eng or trans

Best oil on the market

I have been running Amsoil V-Twin 20W-50 in my Harleys for the last 20 years. Never had an issue and gives me peace of mind having it in the bike, current bike is at 76K miles. I still change fluids every 5K even though it supports longer intervals. I tend to make a lot of short trips so I change it more often.

I run this in all my Harley Davidson's. It keeps the motors cooler and smoother. I am assured that it will keep everything lubricated and surpass any bearing test.

Love the product. I ordered once and missed out on the free hat offer. Maybe next time

Got 180000 km on my twin cam 2008 without any motor work has to work for my 22 heritage.

Had this order shipped to a Brother in my MC Club. No problem using an address other than my home address. Thank you Amsoil

Been using this oil for over 2 years engine run smooth and quiet

Awesome oil and lower head temperature would highly recommend it

Although the oil is good it did not include any o-rings to go on plugs

Parfait pour mon bike

This is the best on the market for my Harley Trike. I wouldn’t buy anything else