Customer Ratings & Reviews

I switched to Amsoil full synthetic after experiencing some sluggish cold weather starts using the competitors conventional oil. Now I have quicker cold weather starts and great warm weather protection. I have not only switched my trucks to Amsoil but also my boat and four wheelers.

Fantastic product. I use it in my Ridgeline. I opened the oil cap just to look around, the inside of the engine looked new even with over 100,000 miles. Never uses a drop.

fill it out for me

Very good product, I use on all my oli changes.

Great product, my engines look great when I open them up! I run amsoil in two turbocharged cars and a streetbike. Track days, canyon roads, daily driving, it's great for it all!

I have been using Amsoil products for over 20 years. They have never let me down and I truly believe they save me money in the long run.

Been using for last 5 years. Stopped my old engine from knocking, and went from using oil to not using when I switched to Amsoil.

I used your oil more than 15 years, now my car run like BRAND NEW (My car Is Honda Accord 2008). Thank you.

2017 Taco TRD offroad 4x4. I have just over 2500 miles on this oil now and have seen real MPG gains, granted very slight ( just over 1 MPG gain). My truck definitely runs better too.

As long as Amsoil continues to win the comparison tests against the competition, I will continue to purchase this product. The pressure is on Amsoil!

I put this in my wife's Audi and my Range Rover sport better engine protection and best oil you can buy.

I initially ordered the transmission fluid and accidentally got the engine oil. After returning the engine oil and receiving transmission fluid signature series, I must say how pleased I am. I noticed the few MPG improvement after changing the transmission fluid which had 43K on it. The engine shifts through the gears more smoothly.

I have a 2010 minivan that used 1/2 qt. per 1000 mil. after using 5w-20 signature series motor oil it now uses none "this is the good stuff!"

Keep my car in Tip top shape.

my truck has 256000 mile run like new

Great oil, everything advertised is accurate!

I use the oil and filters in my muscle cars and truck. The click everyone complains about went away in the motors .Easy startup on the motors and no dry lifter sounds.

I use all Ams in all my toys and cars! You get what you pay for. This is the best.

When trying to go the full 8000km between oild changes typical synthetics do seem the break down around 6000km, You can tell but the return of valvetrain chatter even faintly after startup. I've noticed the Signature series holds up and I no longer hear that return as the miles / km's increase. Great Product!

The title says it all been buying for a long time for multiple different vehicles never fails