Customer Ratings & Reviews

Great oil and filter expensive but worth the mulha

I've owned my 2015 Silverado 3500HD since new and have used Synthetic oil from new, I change my oil every 5000km or 12 months.( I don't put many km's on the truck , only used to pull a 36' travel trailer ) I used to use Rotella T6 5w40 until it got hard to find after Covid and the price shot up. I switched to Amsoil Signature 15w40 and use the Amsoil 20 micron oil filter. My oil used to go black in less than 1000km, but now that I've switched to Amsoil my oil stays much cleaner and is getting better with each oil change. If I add up the cost to use Amsoil per year and multiply that by say 10 years it will only cost me roughly 2000.00. The cost to replace a worn out Duramax is 20,000.00 plus, I would say that it makes good sense.

it protects the bearings very well.

Great oil fast service.

I had this tick after changing oil. Someone said to try amsoil it should go away. Well it did so what ever you think is the best because Joe said it’s the best because his friend of a friend said so well good luck.

Oil seems to work great! The oily Oil I use in my Cummins

Getting 35k on this stuff in 6.7 cummins with amsoil bypass system on analysis...500hrs on commercial equipment with flawless performance excellent analysis and could push it alot further than I do..

Great product so far, running it in my 2021 Nissan Titan

Third time I connected you. You were supposed to send me a self address ticket to send back a gallon I ordered to much. I’m giving up. But it’s the only oil I use in my truck

Best oil for duramax engines

Only oil I have ever used for my trucks.

I used the in my 2006 Duramax since it was new! I have 500,000 KLMs on it now and never had any issues with this engine!!

the best oil you can buy.

Love this oil. 6.7 power stroke with 95,000 miles It’s the only oil that’s been used since new

This is the best oil that you can get. You can see how well it's held up during oil changes. It's the only thing I'll ever use in my super duty.

I exclusively use Amsoil on all my vehicles and toys. The only negative I have is with the rewards. Why aren’t they just built in? I always get an email saying free this or free that but never remember what the code is. Why not just include it?

Using it on my 2015 Ram Ecodiesel, It immediately quieted and smoothed out the engine. I'm at 125k miles and no issues. I will continue to send in my oil evaluations for testing and hope to see this truck live a long and happy life. Looking to do my transmission next to prolong longevity and performance. Thank you Amsoil for a great product and for making kits specific to my vehicle, it takes the guess work out of it. Thank you,

I was driving over 4000 miles a week and only used Amsoil. The only oil that would hold up.

Do the math, after switching to 6x, I haven't had to add a single drop in over 10000 miles, and I only put on 10-15k a year.vs the previous where it was about a gallon a month. Still looks good after a year, love it!

My semi runs awesome on this oil