Customer Ratings & Reviews

Use this in my Subaru XV. Engine runs great, and Blackstone says it works. Happily run this for the extra piece of mind.

This is a great oil. It runs amazing in mu 2008 WRX. Wouldn't use anything else in it.

Wonderful product. Im never going back to conventional oil. I feel like an idiot for using it for as long as i did. Bottome line, better fuel efficiency, longer gas mileage, it feels like my engine glides with this oil. Do it!

Run in my mowers great product

Works great

Use this oil on a Lincoln hybrid. The car is very sensitive to changes. The drive being the same day in day out. Changing to this oil improved fuel economy by 1.5 mpg. Engine runs smoother also.

I have been using 0W-30 Amsoil Signature Series since about 36,000 mlies on my 2007 F150 along with Amsoil oil filter. 281,000 miles and still running great. Excellent power and good fuel mileage. Of course I also do the other routine maintenance as well. People can't believe how quite it runs and still has good power. Amsoil is fantastic.. Engine still good and tight, no oil leaks!

Have been using this product since I bought my truck new in 2007. Have seen an increase in mpg. Recommend the oil.

Improved gas millage

I love this oil. I've been running in a 2006 F-150 for 6 years now (which has known sliding issues) without a hitch. I take a sample once a year and send it to a lab to get tested to make sure the engine is healthy. I put 10,000 on the oil and only added one quart in the middle over an 18 month time span. The test came back great. There were some higher metal contents due to rough towing in the mountains, but that was to be expected after what I put it through. They recommended switching to 7-8k intervals or one year, if I kept up the abuse. As long as you are not doing heavy towing, this will definitely last you the year it is guaranteed, and then some.

Been using the oil for 10yrs on all my vehicles after the recommended break in intervals. Never had any engine problems and love the extended intervals

I've used Amsoil in my vehicles for many years now. Filters also. I feel it's the best for my vehicles and that gives me peace of mind.

I have been using Amsoil for years. Started out using it in dirt bikes and ATV and now in all of my vehicles. Amsoil is nothing but quality and is a must if you care for your vehicles.

Use this oil in my pickup an it keeps everything clean in eng have pushed more than 1 Nissan eng over 100k on this oil

Good all around better in the cold less oil changes cheaper on the end less wear.

Amsoil has proven itself to our family over many years, and many different applications. Motorcycle, automobiles new and old, pickup truck, garden tractor, garden tools. We apply it to everything we can. The 5W20 has gone into our two Hyundai's both bought new. 2013 Sonata, and 2014 Elantra. Amsoil always surpasses expectations. Stays remarkably clean and right up to the full line on the dip stick.

Excellent service and product

Using 5w20 Signature Series in new Ram 1500. Love the quality of Amsoil products. I can go long chang intervals without worrying about the oil breaking down.

great motor oil as is the entire amsoil line of products

This is supposed to be the best synthetic on the market. Everyone I talk to who are mechanics swear by it.