Customer Ratings & Reviews

Have not used it yet, but it should be good.

Tried it out for first time switched from Mobil 1 and I have better gas mileage smoother running engine all around great and will continue to use

From what I have read and seen on videos the Signature Amsoil is the best on the market . I have been using it in my 2021 Jeep Grand Cherokee Trailhawk with a 5.7 l Hemi since new . I can get free oil changes from Jeep but I supply the Amsoil and my dealer changes the oil and filter . I am trying the 10000 mile oil change now that I am using Amsoil. That comes out at about one year of driving . I want this Jeep to last well over the 200k mark and if all is true I have a feeling that it will . I have about 30 years of experience with race track type vehicles including my last 700 HP C6 Corvette track car . During that time racing oil was a very important subject. So I probably have done more oil specs research then most .

S550 Mustang, 5.0(ish)L, fully built Coyote, PD blower, daily driven, plenty of WOT on weekends, ~600 to ~800 whp (depending on tune up, fuel and pulleys). About 35k on motor with nothing but Signature Synthetic every oil change. Bottom line- motor is as healthy since full break and that gives me the confidence to nail it time and time again knowing I'm protected by Amsoil.

Gotta say I’ve used a fair amount of oil and so far amsoil is definitely my #1. Went a full year with out changing my oil and it burned a full 2 quarts. 2016 Chrysler 200 limited Takes 6 quarts for oil change and filter But definitely, definitely needed to be changed after 6 months. I get it you can go a long time before changing your oil but using a 0w-20 it ended up being thicker and made my car run like garbage, not including the oil loss. I have a new ticking noise that wasn’t there before so regardless double check you levels after a couple months. Amsoil is a great oil just keep an eye on how your vehicle is running. I noticed that I was having a lot less power and drinking a lot more gas than normal. Ended up doing a flush and 2 cycles of oil changes in the same week before it started running back to normal.

Amsoil makes my SUV run smoothly and the oil last for 10,0000

Great product and would highly recommend. If you're wondering if it's worth paying the extra money, just price out having your engine replaced 😬

I think putting in outside test results on oil comparisons is critical, especially comparisons of other synthetic oils. I convinced yet another friend on amsoil because he could compare amsoil synthetic to other synthetics.

I such great luck with Amsoil years ago as a single guy. Now that our family has a second car not covered by a maintenance plan it's back to Amsoil for us! Have a look out there for videos showing the difference between full synthetic and regular oil with respect to varnish buildup on the inside of engines. Cleaner is obviously better lol Totally worth the price. Have a good one!

Best oil on the market,motor runs super quiet especially with 115k mi. on the clock,a little pricey even with the membership discount but well worth it.

Running in a `16 Suburban L83. Runs great! Smooth and quiet. I don't know of a better oil for this application!

I have been using this oil for more than ten years in both my cars. I only change it once a year. It costs me less to use this high quality oil than it would to change my oil every 3000 miles. My Jeep has 140,000 miles on it and still runs like new.

As I have needed inventory, I have been switching all of my vehicles and engines over to AMSOIL. This is the first time I have used the 5W-20. It does not disappoint, never thought it. On top of the oil being great. the service that you get from this company is outstanding. I ordered this as a last minute order as I thought I had my other oil in my inventory. I went to service this vehicle and I had no oil. I ordered the AMSOIL and the order said it would take longer than normal and to expect it in a week to ten days. I actually received two days after my order was placed. Some of the praise goes to the shipping company, but most of it goes out AMSOIL for shipping the same day as the order is placed.

There are a lot of good motor oil products, but I have to say based on the performance I'm getting out of my vehicle Amsoil has got to be at the top of the list !!

I have used Amsoil for many years and found the products to be exceptional. No issues to date.

Just started using amsoil again after many years! Finally bought a car that it was worth running in. Great products and exceptional shipping time.

I haver 5 vehicles none of them get over 12000 miles in a year so I change all in December I feel like I am using the best lubrication protection on the market so even if I went over 12000 mile no problem

I purchased my 2011 Chrysler 300 used with 17000 miles and immediately switched to Amsoil and today she's at 105000 miles and no engine mechanical issues whatsoever. I also change my oil filter cartridge every month to insure clean oil.

I have been an Amsoil user for decades and will use no other filters or lubricants in my vehicles.

I got tired of formulas changing and price swings and availability issues with other brands....I have switched for good to Amsoil and am pleased with the performance and protection