Customer Ratings & Reviews

I use this in my Focus ST, I know the ST suffers from LSPI. Haven't had any issues even after tuning and upping my boost from 18PSI to 25PSI.

I used this product on all my cars that are on diesel and gas different years and run very good and I am very happy that the Engine runs like new I love the results

It's the best, it really is. No matter how hard I push my hellcat the oil just stands up to the punishment, and when I pull that dip stick out the oil is STILL clean...

Great product! I use AMSOIL in every engine I own from Diesels to weedwhackers. This 5w20 is new to me but has the same basic characteristics as all AMSOIL products.

I use in my 2014 GMC, great cold start, last for full change at 7500 miles

Amsoil synthetic motor oil is the only band I trust to use in my cars. I've been using Amsoil for the past 15 years and it out performs all the other bands.

This oil is in both of my children's cars which are high mileage Ford Taurus and they don't use oil between changes

got a new 2014 Toyota Tundra, getting baptised w/ Amsoil. just like every vehicle for the last 20+ years....

I use this oil in my Subaru, 0% oil consumption in 6k mile interval, I use it in several customers vehicles, runs full 10k mile interval as per vehicle oil monitor also with 0% oil consumption, great product!

I use these products on every car and truck I own.

i use amsoil in all my vehicles car motorcycle and snowmobile no problems with any of them with amsoil in them!!!!

In my four personal vehicles I use Amsoil 0W-30 Signature Series and perform my own oil changes. I also perform oil changes for several of my adult children's vehicles. My brother-in-law does oil changes for his grandson who purchased one of our vehicles a year ago. He wanted to stay with the Amsoil products, but has a tight budget. My daughter's family also has budget challenges, so I have decided to use the reformulated 5W-30 XL oil for her vehicles. My brother-in-law also wanted go that route to save some money. I think it is a great alternative for exceptional protection and cleanliness (TBN 10) at a budget friendly cost.

Used it in my 5.3 Sierra. Good price for great oil

Have been using Amsoil in my personal vehicles for the better part of a decade now. Michigan weather will eat the body off of the car but the engines purrrrrr! From small engines to ATV's to motorcycles to my Subaru, I can feel (smooth) and hear (quieter) the difference. Moreover, when friends comment on how good something of mine runs, it reinforces the fact that Amsoil is an intricate part of my maintenance routine with all engines in my family.

Change the oil when there's 15% oil life left on last oil change. No problem what so ever.

Use the product in all of my cars. Have used the Amsoil since the vehicles were new and the vehicles engines still run like they were new! I highly recommend Amsoil to all vehicle owners.

Bought some XL to take me to April, which is normally when I do my annual oil changes with the Signature Series. The XL works great, flows excellent in cold weather, etc. I've pretty much gone to using Amsoil in all my vehicle's, in every place lubricant is needed, from trans fluid, gear oil for the diferentials, grease, ect.! Most everything i buy for the vehicles comes from Amsoil!

I enjoy it. Good peace of mind knowing my truck has good oil in it.

Changed my 04 F150 over to XL 5 w 20 Synthetic shortly after purchasing it . I did my research on this product wanting the best protection for my vehicles in all driving conditions. Amsoil gives me the piece of mind i need for worry free lubrication reliability.

Comes out very dark for a new engine.