Customer Ratings & Reviews

My truck uses 8 qtrs and I was not wanting to change the oil every 3 to 4 thousand miles so I used Amsoil for the best protection and duration. I use Amsoil in all of my transportation. Never had a mechanical problem. Start out with the best and don't worry.

I have ran Amsoil in my diesel truck since 2008 and converted my girlfriends gas truck over about two years ago. I like reading about the testing done comparing Amsoil products to other companies products. I feel like Im using the best oil out there. Soon my 70 Chevelle will run Amsoil too.

I replaced a leading brand with Amsoil because genuine lab tests demonstrated superior performance in our hot climate. It ,as a bonus stay's cleaner longer in my motorcycle and high performance boat and car engines than other synthetics and petroleum based oils, which makes for far less combustion made carbon and fuel contamination, the two main engine damaging agents that accumulate in the crankcase..

I works well in my dakota and have used only amsoil in my ruck for the last 100k I have @190k on it now

So far the Signature Series 0w-20 oil is doing great in my 2016 Honda Accord 6-speed manual. My first oil change was at 5,000 miles and my mileage as gone from 35+ to 39+ mpg. I'm sure that Amsoil had something to do with it. Car runs smooth and strong. Almost ready for my next oil change. I'll be using the Signature Series in my Honda from now on. Amsoil worked fantastic in my old 2003 VW Jetta TDI which had over 360,000 miles when I sold it and my friend who bought it from me will be using Amsoil in it as well (now has over 375,000 miles). I'll be switching my Ram 6.7L Cummins 6-speed to Amsoil next change as well. Though a little pricey, Amsoil makes good products that definitely protect your investment.

the best oil money can buy, don't take my word, try it for your self.

Protects at higher levels than the competition and is great in cold weather start ups.

I started using Amsoil Signature Series 0W-20 in March 2008. I was skeptical that oil could last a year so I tested it out on my Mercury Sable before putting it in my F150. I always used Mobile1. After one year and about 14,000 miles I sent out an oil sample to be tested. It came back no damage to the engine and that I could kept running the oil. So I ordered enough oil for the Sable and the F150 and have been running it ever since in every vehicle I own. I started using the 5W-20 when it became available. And I always use Amsoil oil filters.

I been using 5W-20 AMSOIL in my supercharged 06 Mustang for years. Runs like a champ. Also use it in my 10 F150 KR as well which I use for hauling and road trips. Wouldn't recommend any others. Great oil, provides solid protection. I use their other fluids in my vehicles as well to include my 14 VROD Muscle and 09 Nightster.

I started using Amsoil in 2011. I talked to several people at work that used Amsoil products and we're very satisfied with it. I got a dealer at work to order the Signature Series for my Tundra. Well, 5 years later, I'm still using it and still loving it. I've also used the transmission fluid and products for my ATV. I'm sold on Amsoil.

Retired my 1994 Toyota xtra cab 4 cyl, 5spd pickup in 2014 with 267,000miles. Started using Amsoil around 70,000 miles because I got tired of changing oil every month. Never burned oil. Truck had a full load with it in the entire time I used it. Worked that motor hard.

I have been using the signature series 5w-20 synthetic motor oil in my 2005 Dodge Ram 1500 (Hemi) since it was new and after 11 years it's still running strong.

I am a part time collage student getting my certification in auto mechanics, my engine seems to run quieter and the mileage has gone up maybe 1 or 2 mile.

The typical cold engine slap noise is gone. Oil pressure stays up after engine warms up and fuel mileage continues to climb. Do not hesitate to buy this oil. Mobil 1 isn't close!

I use this oil in both my car and truck. I like how I can schedule my oil changes during the nice weather seasons here in Idaho. I been changing the oil once a year without any issues. The oil always looks very clean and clear at changes.

I grew up in a family where good oil was the name of the game to keep your vehicle going for many miles. Just when you think the car is on it's last leg it will keep running and I believe it is due to the success of Amsoil products being used. If you are looking to only have to change your oil 2 times a year, once in the spring and once in the fall. I recommend you to buy this product. I have had great success with my vehicles and with Amsoils services.

We now use Amsoil 5w-20 Signature Series + Amsoil EA-Series Oil Filter on a 2004 Lincoln Towncar. Mixed driving mileage improved by 3 mpg over the OEM oil + filter, and highway mileage increased 5 mpg. The engine runs much smoother, particularly at idle. So far, the 5w-20 Signature Series has demonstrated itself to be of the same exemplary quality consistent with other grades of Amsoil Signature Series.

I have been using Amsoil in my vehicles since 2005. The money and time I save using the extended life filters and the quality of the oil is unsurpassed. I am glad Amsoil now has oil for my Dodge Ram 1500 Eco Diesel.

I only used AMSOIL products in my vehicles.

So far so good. Started using this as of 70,000 miles now at 110,000. I really like the once a year oil changes. I'd be interested in seeing an oil test.