Customer Ratings & Reviews

This is the second time I have filled my 2012 Toyota Tundra Crew with 0W-20 synthetic. Even though it takes 2 full gallons for a fill up its well worth the time and cost. This oil only has to be changed out once a year or within an extended driving distance, or hard service. My Tundra does see off road quite often and I've never had a worry about over heating or an other oil related issues. With a long life oil filter and air filter changed at the same time, I only have to change fluids once a year. That's awesome, as I travel quite often as a wounded Veteran, going to WWP events and also using my truck for Team Rubicon disaster relief efforts. The sticker on the window gets the word out, the truck running flawlessly is all the proof I need. I'll keep using it as long as you guys keep making a great product. Thanks SGT. Eric DeGroot (U.S. Army Retired)

Took a long hard look at using Synthetic Motor Oil Products , back in the middle 90s, and have spent over 30 years in the Air Force I knew what synthetics were about.. And now I only had to figure out what were the best ones to use in my Cars and Trucks.. After about 8 mos of researching Fiction and Fact about Synthetic products, ( They are not all the same, especially the Base Oil ) I settled on AMSOIL for my Oil and Especially Filter Needs .. I feel that the Most important part of using Synthetic products is the OIL Filter, and its Specifications.. Many Filter Manufactures are reluctant to give information on their filters makeup. But you can find it if you dig deep enough and Understand the Testing regime used to make comparisons. AMSOIL has been around longer than anyone when it comes to synthetic oil for your vehicles.. Just go with the Best.

I love this oil. It lasts for up to 25,000 miles, which is awesome. AmsOil Rocks!

It's a great product but I'm thinking about using the 5w20 racing oil next.

I have been using Amsoil signature oil in my vehicles for the past year and have been able to cut the cost of oil changes by approximately 50% ! I am sold in Amsoil

It didn't take long for my order of oil and filters to arrive. I remember placing the order, next thing I knew it was at my door. You don't get service like that anywhere else

Increased fuel economy by 1 mpg

Quick delivery couldn't ask for a better way to buy oil!

Is this product and love the 25,000 mile oil change!

In my honest opinion, I love this oil. My honda 2008 civic is at 277000 miles and i owe alot to the fact that amsoil has thw best product in the market. I usually change my oil around 25k miles. One time, I was 35000 miles on an oil change! My car still has the pep it did when I bought the car. I switched from a competition product to amsoil about 10000 miles from being new. I highly recommend this oil.

I drive a lifted 2005 Ram mainly used for towing an enclosed race car trailer and noticed an increase in engine performance, and a MPG increase.

I never would have thought that using a premium oil would improve MPG, but it has. I am getting 5% to 10% increase.

After reviewing oils including Royal Purple, Mobile 1 etc I found Amsoil to be top notch. I would not use anything else in my vehicles. I also use the Amsoil oil filters which are the best. Amsoil is higher in price but quality of product and piece of mind that my engine is protected is priceless.

I run this in every car I own and have for years. less maintenance since you only have to change it once a year is worth a little extra cost to me started putting it in my 5.4 triton truck when I got it used with like 160k on it. it smokes like heck but still going at over 300,000 miles!! that is really saying something about this oil and it burns less of amsoil than other synthetics.

Have been using Signature Series oil for years in all my vehicles, past and present. Long life and excellent protection. 2008 G8 GT 6.0L used Signature Series since day one, 120K later, engine still like new.

THE PRODUCT IS EXCELLENT, BUT ORDERED ON TUESDAY ABOUT 10 A.M., U.P.S. TRUCK PULLED UP AT ABOUT 10 A.M. WEDNESDAY. WOW

Great, great oil all I will use in both of my vehicles

I have used signature 5w-30 as my all-around oil in everything I own. Cars , trucks, lawn mowers, snow thrower and generator. Since 1994 I've never had an oil related issue and it makes oil changes simple , just grab the Signature 5-30!

I purchased a Chevy truck with a Duramax engine and got information that Amsoil was the oil Duramax owners used so I started using Amsoil, I purchased a 2004 Honda Accord with 202,000 miles on it for a vehicle to drive to work, the former owner said that the oil was always changed on time with Honda brand oil, he said that it would use about a quart between changes, first thing I done was change the oil, put this signature series 5W-20 synthetic in it also used the amsoil filter, 3000 miles it used about a quart, changed the oil at 3000 miles, went 5000 miles on the second change didn't have to add any oil to it, may have used a half a quart, changed it at 5000 miles, hoping it won't use any after this next 5000 miles, to me this signature series has to be doing a good job to make a 210,000 mile car go 5000 miles between oil changes with no oil consumption.

I use Amsoil signature series engine oil in my Ford Expedition. I have had an independent oil test done after 25,000 miles and it showed the oil to still be ok. It may be one expensive oil change but considering how much longer you can run the oil vs. changing it every 3000 miles this is a lot cheaper and a lot less Saturday afternoons wasted changing oil. Thanks Amsoil for a great product.