Customer Ratings & Reviews

Car runs 100% better starts instantly in cold weather improved mileage

I couldn't believe how quickly I noticed a difference in performance in less than 100 miles smoother,stronger on a 160k plus Corolla

The AMSOIL Performance Improver Gasoline Additive has improved my gas mileage and keeps the engine running smooth. I use that in between using the Upper Engine Lubricant. I would recommend these products for any vehicle.

Dose a great job for cleaning out an engine that has carbon build up problems. Helps with fuel economy a lot also.

Use all your products for my car

Use 1 bottle in all our 5 vehicles 2 times a year and have noticed slightly better mileage and drivability. Great product at a very reasonable price.

So important to use before an oil change. Especially for the GMs that are direct injected. Treat yourself don’t cheat yourself.

I added this to my stock style radiator for my classic muscle car. It lowered the coolant temperature dramatically in the heat of the Florida sun in the summer. I would run at 210° now I barely make it to 190 on average I’m hovering right at my thermostat which is 185. The car runs amazingly well

I have to admit I've tried a lot of fully synthetic oil but AMS oil is second to none I highly recommend it you can feel the difference you can feel the power for my 2007 Chevy Silverado 1500 classic

Je synchronise ce traitement avec mes changements d'huile. On sent vraiment la différence!

Like the title says, I’ve been using this in my daily driver…a VW Golf R that I put roughly 30k miles on per year. Since I’ve been using this on every other tank, my car has been averaging an extra 2-3 mpg versus without.

AMSOIL was recommended to me by family. I tried AMSOil in 1 of my vehicles and immediately noticed a performance improvement in response, idle, fuel economy, and noise reduction due to the engine having to work less to operate. Since trying AMSOil in August, I immediately signed up for their membership, moved all my vehicles lubricants over to AMSOIL, follow their maintenance schedule to spec, use their Upper Cylinder Lubricant on every fill up and exclusively use their products. Save time & Money, AMSOIL is the way to go.

Helped my PowerWagon get an extra 2 mpg on highway I’ll take it.

First time using this product and it does what it says. Noticed significant improvements in the first couple of miles. Sluggish acceleration went away, improved my gas mileage, and got rid of a ticking noise I thought were the rockers, turned out to be clogged fuel injectors. Great products. Customer for life!!!

Works

Very good service

I use this in my 24 Expedition Max Stealth Performance and 23 Bronco Raptor after each oil change- I only run 93 octane in both- this product is a must in my maintenance plan and both my vehicles run perfect!

Engine runs quieter get better fuel mileage starts 100% in colder temperatures. Melvin shingar

Put it in a 2004 F250 V10. that I bought at auction with 146000 miles. fuel milage increased from intial less than 8 mpg to 10 mpg around town , get around 12mpg on highway.

Excellent product