Customer Ratings & Reviews

Have tested it out an out performs wvery thing else as in apples to apples

AMSOIL, the best thing that ever happened to my automobiles! I have used AMSOIL for decades and would not change to a different brand even if it came free...

I've been using Signature Series 5W-30 Synthetic Motor Oil since I purchased my 07 Silverado back in 06. I change my oil once a year and have had no problems at all. My truck now has 196K+ miles and only recently I've had to add about a half quart after 6 months. I think I'll start changing the oil twice a year from now on. My truck deserves it. Amsoil synthetic oils are the best!

It dose what it's suppose to do.

It was originally recommended to me by a friend nearly 20 years ago and I have used nothing in my vehicles but Amsoil lubricants ever since. I have a pick up with nearly a quarter of a million miles on it and still going strong. I think that they are the best products made for all your vehicles, bar none.

I have a friend that use it for his Ford Mustang

We as a family have 6 vehicle & all kinds of 4 & 2 cycle small engine equipment and we use Amsoil in everything!!!

Use amsoil on my ecoboost Never had a problem with timing chain and used it on my wife's 2008 ford explorer with the 4.0 no engine problems and it has 200,000 miles

Use all the time,have use for years only oil I use for my cars.

I like this product because we're always on the road and we need a heavy duty oil to withstand the punishment that we put it through in our trucks.

I have it in both my vehicles 2005 Toyota tundra and in my 2015 Toyota Camry I love the stuff words can't describe. Zero friction zero where . I have six of my closest friends all hooked on it too and they love it as well

My engine and transmission both have responded very well to your products. My engine even runs smoother

Are use Amsoil in everything I own

On all my vehicle's, and all my friends and customers. Thank you for it.

I drive 30,000 miles a year. This saves me a bunch of money on oil changes. Car starts just as easy in winter as it does in the summer.

used this product for years and it keeps my wifes 2004 honda hybrid running like a top. will keep buying amzoil oil until the car dies

It pays for itself in increasing mileage and extended drain intervals- win win, plus all these contribute to less waste oil and sustainable practices

There seems to be a slight advantage using Signature Series over the XL oil. It seems like I get an additional one or two miles per gallon when using Signature Series compared to XL. One thing that is unusual about Signature Series is that it can take on a red tint after a few thousand miles. I was concerned that this might indicate that transmission fluid had contaminated my engine oil (?). Calling customer service and speaking with a technician, I was assured by the technician that this is caused by the anti-oxidants in the oil that sometimes take on a red tint. So far, I'm very happy using Amsoil products and will continue to do so.

Regular use, nothing extreem. My vehicle did have slight idle issue, possibly from gasoline impurities. After switching to Amsoil and oil filter it runs completely smooth and purrs like a kitten.

Works really good gave me better mileage