Customer Ratings & Reviews

I've been using Signature series oil for a long time. I always get a great oil analysis. I use all Amsoil lubricants in all my cars and outdoor power equipment. I'm convinced that Amsoil makes the best lubricants.

Great products never let down. Intelligent people to deal with. Pricey, but what isn’t.

After using this oil what little bit I was burning has stopped, also it seems to hold up really well over time.

Meets and exceeds factory expectation have a investment like a car payment use the best to make sure it will last longer than you owe

Works great in my 2015 mustang gives that extra protection that is needed for lubrication to the dual overhead cams and high rpms

I have used Amsoil products for a long time. Their products have never failed me, and I feel my vehicles get the maximum protection available to give the engine the best chance at a long and productive life!

One star because Amsoil should know better than to only offer product in quarts or 55 gallon and not one gallon containers for oil changes by DIYers. Shame on Amsoil.

Love it run it all in our chevy suburbans, change oil every 7 months

I've been with AMSOIL since before 2000 and have used many of their products. There are no other to match their quality period. Their 5w30 is the top of the line. Before I was introduced to the product I used Mobil 1. I chose AMSOIL reading up on their products and later joining up as a Dealer than later in 2006 and 2008 attended the AMSOIL UNIVERSITY. The University has since gone and well I'm still into AMSOIL. Great Company & Great Products.

I own hard driven and well used vehicles. The newest is a 2004 Durango 5.7 litre I have owned it since 2009 It has 332,000 km on it and is still running well. It is rusty because of all the salt on the roads here but it has not let me down. I have changed out a radiator and alternator other than that it has been very reliable. I hate the idea of getting a new one and plan on driving this vehicle as long as it keeps running. It has not started burning oil yet and is still very strong. I have always used Amsoil.

Product was better than advertised. It was delivered earlier than quoted and has exceeded all expectations.

I have tried everything on the market to help stop the valve ticking that my truck had for years, from lifter additives to other good synthetic oils, and still had the annoying tick. As soon as I started my engine with this oil the ticking has instantly went away. I will not run anything else in my engines after witnessing this, that showed me how great there products really are! Thanks Amsoil

Good oil. Seems to make engine run smooth. No oil consumption.

Loyal user for years in multiple cars, 188,000 miles on a Ford 3.5 Ecoboost engine. Never any engine failures or issues. Living in an extremely hot climate and knowing my wife and kids idle quite often with the A/C on full blast in their vehicles. I feel confident this product is, All the time protection. Thanks Amsoil

Been using AmsOil since 1979. Nothing outperforms this stuff and the cost is offset by longer change intervals. I change every 10k and nothing else goes into my vehicles!

I use AMSOIL in all of my vehicles. You get the best protection and peace of mind knowing your vehicle will perform at its best. 2005 Toyota 4Runner has over 430K miles and my 2007 Nissan Frontier has over 171K. All of my previous vehicles also had high miles since we travel a lot. Never have any issues with AMSOIL.

My new jeep gr cherokee loves Amsoil 5-20 and i kno whatever tune or track i expose it to,my oil wont let me down like mobil one did in last trackhawk i had. Great stuff,thanks from an old time hot rod guy.

My 12 Boss302 since new with ford racing oil always put a shot glass worth of oil in seperator every 1k mi. Since switching to Amsoil,no measurable oil in there even between short lof intervals. Wifes 13 VW turbo used to burn 1qt purple every 5k but none at all with your 5-40euro. 30 yr certified ASE tech.

I started using amsoil products in my Yamaha yz250 2 stroke after I seen a guy put straight gas into his bike. He ran it hard in a qualifying race only to realize what he had done. He tore the top end apart only to see no metal chips to scaring or burning. In fact it run well. All this was no doubt to him usually running synthetic Detonator at a 40:1 ratio, etc. So, I was hooked as others who have made that mistake ended up up damaging something. I have used them exclusively in all my bikes, vehicles and truck. It's more expensive than others but you do get what you pay for. The Signature Series is the Amsoil Flagship and I use it in my Hyundai Elantra GT Sport turbo, and my Ram 1500 5.7liter. ii use the OE in my wife's old 1999 mustang with its 3.8liter. I highly recommend anyone to use the Signature Series if you live your vehicle and want the best possible oil running in it!? Try, it and you won't be disappointed, cheers!

I’ve been an auto tech for 36 years. Trust me when I say I would never use anything else. I use Amsoil products in all my vehicles and equipment.