Customer Ratings & Reviews

If you have a Harley this oil is a must. It removes all valve train noise, reduces engine temps and Amsoil's the only oil manufacture to torture test the hell out of your bike to prove it still protects under the harvest conditions. Stop being cheap and spend the dough to make you bike last the longest.

I ran this in my 1985 HD evo 1340 Electra Glide. It kept my engine running smooth, and relativly cool even in the Arizona summer heat with out extra add on. My bike was equipted with an oil cooler ant that was all.

New Truck, replaced regular Oil with Amsoil and 3500 miles later I've noticed better Gas Milege and a smoother running Engine.

I use it in my Engine, Transmission, and Primary.

Great product!

Great oil I have been running from new and have 160,000 miles with no problem.

Amsoil has always been on the cutting edge of synthetic technology. Now they blow the competition out of the water on price as well.

I am a firm believer that AmsOil products have greatly extended the usable life of all my equipment.

I run a shop and everyone who has tried it in the Harleys or be in metric and Euro bikes love it. All I use now.

I've used this 20W50 in several air cooled Engines with great results. In Evo and Twincam Harleys it can be used in the primary and tranny as well. One oil for everything, easy. Been using it in a Yamaha Road Star last season (10'000km). No issues, hot or cold. Highly recommend this oil

Use it in every thing that uses oli

Excellent product quick shipping.

I have been using this oil in my motor for about 7 years. I think it's the best oil for my motor.

I use the synthetic oil in the crankcase and primary in bot of my late model Harleys. It seems to run cooler than the other oils I have used.

In a Truck

this oil is great stuff, I use it in my vintage bikes, a 68 BSA and a 70 triumph Bonneville. It works good in these bikes.

Have used many synthetic oils. Amsoil is top notch. Far quieter than other oils as far as engine noise. Amsoil Tranny fluid outshines the competition with smoother shifting and ease of finding neutral. If you ride a Harley, you know what I'm talking about.

This oil makes the bike run smoother and quieter. I like that I can use it in the Engine, Trans, and the Primary. I use Amsoil in all my vehicles. Nice to change oil and filter once a season and still get great protection.

Years of use = PEACE OF MIND, hot n cold year around in CO

I bought the 20W40 for use in my Victory Cross Country. The top end is noticibly quieter. The oil change is good for a year, or 10,000 miles. I'm happy!