Customer Ratings & Reviews

Every time I use anything Amsoil I notice an improvement in motor function in every way.. truck, bike, boat chainsaw; if you know your motor you'll know the difference Amsoil makes.. You CAN feel it!!!

I only run Ams oil in my bike.

I've ran this oil in 2 identically set up Harley Davidson Twin Cam engines. First one Amsoil was added after my factory warranty was up at 40,000 miles. By the time it had 75,000 on it,it was using a quart every 2500 miles. The other engine has had Amsoil 20w 50 in it since new. It currently has 128,000 miles on it and is now using 1 quart every 5,000 miles,plus the heads have never been removed! I truly believe that it is superior to everything on the market.

Change over from HD oil, better quality and price. Got about 2000 miles oil still looks new.

Bike shifts better. Oil stays clean longer. No problems at all. Good stuff

I wouldn't use anything else in my Chieftain. Engine runs cooler and quieter.

Does the job with extended mileage.

I remember the days of sending samples in to determine when to change your oil. As a young man I did not understand why. That was in the 80's. Now the ease and reliability comes to your door step after years of testing and verifying performance. I have convert all vehicles from 59 Chevy to 2013 Roadglide without an issue. Thank You. Willy Veteran USN

I'm a firm believer in amsoil products. I not only use amsoil in my motorcycle but in all of my 3 cars and truck. I even use amsoil in my deisel tractor and garden tractor and trimming equipment. Haven't ever had an issue with any motors useing amsoil

Run nothing but Amsoil in my road king and have used it in other bikes and on friends bikes nothing better imho

Air cooled engine. S fl Heat. Needs straight 60

Everything has been great

I have been running Amsoil products in my 2002 Fatboy motorcycle for the last two oil changes and the bike runs 10-15 deg cooler as measured on the gauge

This is the only oil & fluids I put in my HD. My engine temps are cooler. My transmission shifts smoother.

I have used 20-50 Amsoil for over 17 years. 2 of the bikes have had over 90,000 miles with no oil consumption or failures,my present bike has over 30,000 on it.I use Amsoil only and will keep on keepin on.

Keeps the motorcycle running like new

I just traded in my 2000 FLHTCUI with 108, 000 miles showing on the odometer. I only traded it because we are going on a trip into Canada and I have had mainly electrical problems and suspension problems in the past. It is getting too hard to find parts for her so we made the decision to find her a new home. The motor was still rock solid along with the tranny and primary but we were concerned mainly with stator and fuel injection. It had the old Magnetti Marelli injection system that was only used 99 thru 01. Amsoil 20w50 V-Twin oil kept the motor, tranny and primary chugging right along!!!!

I have used Amsoil in my last two bikes. I always found the oil to meet or exceed my expectations consistently. I travel lots, putting on 20 to 25,000 Kms per year which is a few considering our short season. I usually run one trip to the Southern US so the temps can be hot. I never had an issue until last year. In 2017, I traveled through Nevada, parts of California and Northern Arizona in the first two weeks of June. Temps reached 45C, or about 115 F. I had installed a new motor in 2015. I was advised to use a different synthetic oil, which worked fine in cooler temps. On this trip the other oil broke down completely. My oil pressure fell and the motor became noisy. I changed to Amsoil 20-50 and had no more issues. From here on, it will be Amsoil for me. It stands up much better to extreme conditions.

Best dam synthetic oil there is

I don't use anything but Amsoil products