Customer Ratings & Reviews

I have used the 20/50 synthetic in several of my Harley's over the years. In fact, long before it was called VTwin oil. Motor runs smooth, cooler and keeps everything humming along.

Tore down my big twin for maintenance at 90k...virtually no wear on cylinders or pistons...amsoil is the only product I've used since buting the bike new...amazing antiwear capabilities

I use this in a 1340 evo, 2011 flhtp and 2017 flhtk. The motors run cooler quieter. I change at 5000 mi intervals or 1 yr.

I've been using AMSoil for years and don't plan to use anything else.

20/50 AMSOIL I have been running in my 2006 streetglide since it was new rebuilt the motor last riding season it still look new on the internal parts I have a 121000km on the bike and 10.000 km on the rebuild motor. Awesome product yes I do recommend AMSOIL to my friends ??????

As the mechanic for the local Harley Group...they depend on me to provide and or recommend great products to keep all our bikes running great...Amsoil products do just that

I've been running this oilimmy Harley's for 15 years without any issues.

The All around performance of the engine.

I use this brand in both car and motorcycle.

Best oil on the market

year around

This product is used I my Harley's. My 2006 Street Glide has 80k on it and has always had this product in all of the Case's. Still runs great, Clutch plates are original. Look forward to buying again.

Amsoil is great. Use it in all my motorcycles.

My bike runs smoother and cooler with Amsoil also the fact that you can run the 20w-50 Synthetic V-twin in the primary and transmission six bottles a service marks it easy.

Amsoil product are the best in my book. That's all I use for my HOG's

My father introduced me to Amzoil over 30 years ago, it was a great product then and only gets better, I will continue to use it!!!!

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.