Customer Ratings & Reviews

What I noticed immediately was how much cooler the motor runs. I have used this product since my bike was new and won't consider using anything else.

I use this in both my wife's and my Harley Davidson motorcycles.Very good oil

I've been using this oil ever since I bought my 2003 fatboy I probably change it to often but it is your engines life blood I still change it by 3000 miles and looks like you just poured it in ! Love this stuff!

I have used Amsoil in my motorcycles since 2012, and have experienced smoother, quieter idling engine, smoother shifting and better gas mileage. I currently own a 2017 Indian Roadmaster, and have not been disappointed with Amsoil products as I'm getting the same results in the Indian, plus it seems to run cooler. Thank you for great products.

I purchased the 20w50 for my 1999 Harley Davidson Dyna Wide Glide. I will only use Amsoil in my motorcycle. It is the best oil I've ever used and I have used many other brands. I am confident in its ability to never break down or fail for any reason.

This oil has the best resistance for heat and distance. Runs my motor at least 10 degrees cooler than any other. Motor runs quiet, shifts smooth, oil does not break down under pressure. If you have any questions about its performance hears my answer: I have a 2001 Road King with over 200,000 miles. I rebuilt the top end at 124,000 miles. So the bottom end and the gear box are all original (200,000). I ride it everyday. I don't baby it. Oil change every 4,000 miles (Tranny every 8,000). ANY OTHER QUESTIONS?

Great product - engine works the best with this product over others I have tried.

I've been using this product for my Harley over the years, and I find it works better than some of the other oils I tried. Although it would be nice if Amsoil would bring down their prices.

Easy pore bottles, great oil for our erratic climate changes.

I've been running Amsoil in my motorcycle for over 10 years without any problems. My dad has been running it since the '70's from dirt bikes to Harley's.

I've used this oil for my Victory for a few years now and the air cooled beast runs cooler and smoother. Best oil on the market.

Keeps the engine cooler

The only oil I put into my Harley Davidson.

Put this in my 2014 cvo breakout

Only product I use in our Harley Davidson motorcycles. White report says it all, Amsoil in consistanly the best product on the market today.

Runs cooler & quieter

I have a 2010 Harley-Davidson CVO FLSTSE Softail Convertible with the 110 Screamin Eagle engine. Synthetic oil is required for this engine. I've been using AMSOIL 20/50 Synthetic for over 5 years and will continue to do so.

For Hot temp riding, Amsoil 60 is a must.

I made the switch from the H-D oil to Amsoil and immediately noticed an improvement in overall performance and will never switch back to H-D oil! My Honda Civic with 160,000+ miles was really dragging to get going, but after switching my car to Amsoil it accelerates like new again. I have no complaints and will be an Amsoil customer for years to come!

I run this in the engine .trans and the primary.. does very well . The temps are down about 3 to 5% which on a air cool engines is alot....