Customer Ratings & Reviews

This synthetic is all I have used in my 97 Lexus LS400, I change every year, it always looks just like new. Would recommend it.

I’ve been using this Amsoil 5W-30 Signature Series Synthetic oil for the past 7 years in my Nissan Maxima and it’s by far the best oil I’ve used, and I’ve tried many others over the years prior to finding Amsoil.. The car now has 155,000 hard miles on it and still runs like new and have beat the car daily since I purchased it 6 years ago with 2,000 miles. . I run Amsoil synthetic oils in all my cars now and won’t use anything else. Best stuff out there and the corporate bean counters don’t seem to have their hands meddling with the product.

I became a faithful user of Amsoil after having a engine built for a 2014 Camaro SS, will use this stuff in everything I own.

Used in my jeep grande Cherokee, performed great even in -40 and colder glad I made the switch

Became an Amsoil Dealer in 1975! Used nothing but until June of 1984 when a car accident put me in a coma for 5 days - broken back and neck in 4 places and right arm almost torn off. Forgot about Amsoil for a few years, but once recuperated I have used nothing but - and I love it - never a bad experience! Well, back to the review of 0W-30 Signature Oil. Excellent oil. Use it now in my 2013 Toyota Matrix AWD known for (sometimes) using lots of oil, instead of the 0W-20 that it calls for. Hitting 125000 miles and still do not use a drop of oil!

A+

I bought a Scat Pack Challenger that calls for a 0w40 oil. Having used Amsoil for the past few years, I knew that this would be a great choice for the 6.4 Hemi. So far, it has been great!

A 15,000 mile drain interval is recommended. There is one problem with that, the oil is just as slippery at 15,000 as it ever was, but by that time there is an acid and moisture built up which can be smelled at about 6,000 miles.

Best lubricant I have found that keeps my engine oil pressure in my truck that has over 240000

Tried this once and have never stopped. 0w40 isn't offered by most or is tough to find. Amsoil is the only oil I trust and have not had any mechanical issues whatsoever.

i order ASEQT for my scag mower and i got AMTQT so i did not use it and got no use for it! just stuck with it!!!!!

I am not exactly sure how many miles I put on, but i do drive a great deal. I am in the healthcare field in a very rural environment. I need my car to run well and I do not have time for frequent oil changes. Does this oil last for 25,000 miles or one year? I should be more attentive and be able to give a more definite answer, but I will say that with the driving I put on my car (2009 Suzuki SX4) in all kinds of weather, where things are often between 1 and 3 hours between points A and B, the oil lasts a good 9 months before it even begins to break down. I meant to change the oil about a month ago (11 months between changes), but we got hit with major wildfires that put a real damper on all activities. The car is still running great, and the oil will get done this week. This oil i definitely worth a try. I suggest giving it a shot, monitoring your oil and seeing how this performs in your conditions, wherever you are, and do better than me by minding your mileage. Then you have a good idea if it is worth the investment. The Signature Series grade has worked for me, especially when the Amzoil filter is available (Amzoil was out of stock his time around on the filter).

Best oil I've ever found. Been using it for 20 plus years. Use it in everything, from vehicles to lawn mowers. Nothing better.......

Amsoil best products available

Another great Amsoil product.

Using it in my kids sports car. Not outta storage yet. Sure it will be great.

At 72,000 miles, this was my first install of the Amsoil product. Before that I had noticed a Tick, Tick, Tick noise when my engine was idling, but after changing the oil that went away. The only issue I have is that they tell you to change their filter once a year which seems a little nebulous since they don't know how many miles you drive. So, if the oil will last you up to 25K, and you only drive 15K a year, You will have to add a half a quart or so every time you change the filter .

This oil is the only oil I put in my 2015 Chevy SS. High reving 6.2 v-8. I feel very confident in this oil when I put the car through its paces that it's protecting and lubricating all those bearings and surfaces. Engine takes 8 qts. Expensive, but when you own a little rocket like this car, it's worth it. As I add more power to this car, I'll continue to use this awesome oil. Thanks!

This is the best synthetic I have tried. Definitely the best when changing over in higher mileage engines. It will cause no problems, and you will gain all the benefits of moving to synthetic.

Came faster then delivery date nicely boxed up thanks again