Customer Ratings & Reviews

I use this product in all three of my Toyotas. It's a great motor oil! My engine seems quieter and smoother, I have not used it long enough yet to tell if my mileage has improved or not. I plan to continue using it from now on.

I use the product for my oil changes, I've used many different oils but no one comes close to this. Loyal customer to this oil

It run a lot smoother than the P**$oil full synthetic I used during my last oil change and is definitely better than the dino juice it had in it when I bought it

Been using this oil for awhile now like all amsoil oils. The best there is

I have been using this oil for years in myc1997 Honda. 235,000 miles later it runs like a gem! Nothing but the best for my cars and truck. Quality lubricant.

Spec. oil that is required for my SRT Jeep.

Let's be honest it's hard to rate in oil...My wife's vehicle calls for this weight. I do use Amsoil in all of my other vehicles so it just made sense. Interestingly when bought the vehicle I changed it over from conventionals oil it came with. Engine, Trans and PS changed. I saw a consistant 1.5 MPG gallon increase(70% highway/25% city).

Used in all my P/U and SUV for past ten Years

I run Amsoil in everything I own, from motorcycles to cars to antique tractors. Why not spend less time under your vehicle a year changing oil? Great oil!

This product lasts just like it says , a great product

I been using Amsoil Signature Series oil more than 10 years and long story short-i LOVE IT!!! If you care about your ride this is oil for you. HIGHLY RECOMMENDED!

I have run Amsoil exclusively in everything I have that runs or moves. I'm convinced it has greatly extended the life of all the vehicles I own including my drag car. 8 seasons without a freshen up, and still going strong. Keeps internals spotless clean too. 40 below or 120 above, it's the best there is.

I purchased a brand new Subaru outback in may of 2016 and will have over 20,000 on it by the time one year comes around my vehicle runs fantastic, did I mention this is an extremely weather environment Anchorage AK. 20 below no problem, purrs like a kitten oil is clean even at 5000 miles love the oil filters you guys make the best there is!

I currently use the 5W20 oil in my 2014 Dodge Caravan, (also previously in my 2006 Dodge Van), and in my 2008 Dodge Dakota truck and very satisfied with this product. I also use 10W30 in my motorhome and have done so for the past 20 years, again with complete satisfaction. As I live on an acreage, I also use 10W30 in my garden/lawn tractor, and have done so for the past 20 years. In my opinion, this is the only oil I would use.

I have driven my Acura TL for over 100k miles using the Signature 5w-20 synthetic. I will use no other!

I began using Amsoil products over a year ago. So far I have converted all my vehicles to Amsoil. Since changing to Amsoil, I noticed that the engines run much quieter and my gas mileage increased an average of 5 mpg. I like the extended drain intervals and the protection I get. I have two high mileage vehicles and I noticed that the oil is cleaner when I check the dipstick and it's not as dark as it was when using regular oil. I highly recommend this oil.

Best oils ever hands down run it in all my cars including my 331

Use Amsoil in all 4 family vehicles, never let me down and is cheaper than conventional oil changes. Switched a 2005 F150 leased truck that I bought to Amsoil, now has 233K on it & still going strong. Mike

Have a new Jeep Wrangler and figured I should change out the factory oil a bit early after break-in of the engine. Used the Signature fill as I keep my vehicles for a long time. May have seen a small increase in mpg.

After 6000 miles oil is still clean