Customer Ratings & Reviews

I run this oil the full year or 15,000 miles as i fall under severe service useage guidelines. It has always kept the inside of engine clean and i rarely add any oil,it performs well,oil analysis comes back great. Both vehicles i use it in have high miles and i know its keeping them running well. Highly recommended. Amsoil is the best oil in my opinion. I even use amsoil in my lawnmowers. Synthetics are not all equal. This is the best out there. I wrench for a living and have seen the effects of using sub par oil.

I use this oil in three of my vehicles and home generator. I have had nothing positive experiences with and definitely recommend it.

Great product, excellent service

My car has 140k miles and I've been changing my ea amsoil filter every 10k miles (rated for 15k miles) and my oil in my vehicle every 20k miles (rated for 25k miles) without fail. Excellent results and cheaper in the long run when compared to other conventional products.

Have used AMSOIL exclusively for 15 years in my vehicles. Have never had an oil related issue. This oil is especially good in my F150 eco boost engine. Smooth, quiet, economical performance. Best of the best!!

Excellent products! Just bought a 2017 Subaru Outback. Used Amsoil 0-20W and Amsoil Oil Filter. Long time consumer. Great stuff. Run in all of our family cars

Every auto I buy, Amsoil goes in along with their filters....

The oil is good, but with the membership fee and high shipping costs I am going back to Mobile 1 as I did not see much if any of a difference. There is just to many hoops they make you jump through. There should just be a cost to buy it and no membership fee that AMS Oil makes people think they are locked in to buying oil from them so they can "get the most of the membership". I think most people find annoying and just go buy another oil rather than pay high prices on top of shipping and also a fee just to buy it at a reasonable price.

Always use in my daily driver 4 years and 200,000 miles still smooth and strong

I FIRST DISCOVERED AMZOIL IN 1973 AS I HAD A COUSIN WHO WAS A DEALER. BUT AT THE TIME I WAS A 3000 MILE AVID OIL CHANGER FOR 30 YEARS THEN I REDISCOVERED AMZOIL PRODUCTS AS I WAS TIRED OF CHANGING OIL ONCE A MONTH OR SOINER AS I PUT ON 50,000MILES A YEAR COMMUTING SO IN 2003;I SAID WHY NOT MADE THE SWITCH TO AMZOIL AS I HAD RETIRED AND NO LONGER WAS PUTTING ALOT OF MILES ON A CAR. SO NOW I CHANGE OIL AND FILTER ONCE A YEAR OR EVERY 12,000 MILES I KNOW SINCE USING SIGNATURE SERIES I COULD JUST CHANGE OIL FILTER AND CONTINUE TO 25,000 BUT THE THOUGHT OF ADDING ONE QUART OF NEW OIL TO 6 QUARTS DIRTY OIL I AM STILL NOT SOLD ON THAT. MY ONLY REGRET IS I DIDNT USE IT 30 YEARS AGO WHEN I WAS. COMMUTTING. ALSO USE FUEL ADDITIVES QUICK SHOT , BOOST RADIATOR ADDITIVE AND THEIR EA OIL FILTERS ALL QUALITY PRODUCTS

I like the extended drain possibility of this oil. It saves me money and time. Very great performing oil.

Good value, once a year protection.

I use 0-30 in both of my Honda autos. I switch to 0-30 in the summer and 0-20 in the winter. I have 50k mi on the motor in my Ridgeline and it runs just as good as when I bought it. I would not use any thing else.

Love this oil for my silverado. Truck runs fantastic and have not had to add a drop in between oil changes. Highly recommended.

I have used this product in my 2 vehicles since their first oil change. My 2007 Tahoe has 191,000 miles on it and I expect it will perform for many years to come. Although the oil and filter are rated for 25,000 miles or once a year, I still change oil and filter every 6 months; very reasonsonable amount to spend for a bit of extra insurance. I assume my engine is finally broken in since it regularly achieves 20 mpg on the highway.

keeps my engine running great

I've been a customer for ten years now and have always used the Signature 5W-30 in my vehicles. I still own the same vehicles and change my oil once a year. I don't worry much about tracking the mileage but it usually ends up being 16,000 +\-. I'm confident their lubricant is protecting my engines at this mileage and only changing it annually has actually saved me money.

Long time user of Amsoil in all my vehicles. Wife's Honda Accord, my GMC Sierra and Corvette Z06. Outstanding performance oil, filters and gear oils. Would never use anything else. Order online one day and here the next. Oil analysis shows great results.

I like vey much AMSOIL fully suynthetic keep my engine high performance

Stopped using AMSOIL due to metal wear. The engine have never shown metal wear in testing with previous oils of different brands. The oil also changed viscosity and lost about 1/2 quart. I have a similar engine identical and 10K builds separate the two vehicles. I do not recommend 0W20 signature oil for use in city driving conditions.