Arrived quick. Great customer service.

Can't get any better than Amsoil!!

I have been using AMSOIL for years now and absolutely love it! I use the full synthetic and won't ever switch.

Perfect thank you

I've been using AMSOIL 5W40 Diesel Oil in my John Deere 1025r for more than 10 years. I store the tractor outside under cover without benefit of a block heater. Even on the coldest, below zero mornings, the tractor starts right up with just one cycle of the glow plugs. Year round protection in all temperature extremes is why I've been an AMSOIL fan for more than 25 years.

All Amsoil products are great but especially the quality of their signature line. I own a Ram 3500 (non dually) with the Cummins 6.7L and my engine runs whisper quiet with it. I can always tell quality oil with how long the engine takes to warm up. Not only that but the viscosity lasts longer than other oils. I'm something of a nerd to checking how thin the oil is when it drains and I always feel like I've changed my oil too soon. A great product hands down.

Best oil ever

I loved

With the oil bypass system on my GMC 3500HD, I Change the oil and both filters at 15k miles. The system takes about 14qtrs, and this size jug saves time not having to open 10 individual qtrs.

I have a John Deere 2305 Tractor that I've always just changed the oil using the John Deere brand oil. I believe in the AMS Oil brand as an industry leader and wanted to try AMSOIL Signature Series 5W-30 Synthetic Max-Duty Diesel Oil. I noticed a difference on easier starts and quieter operation at all RPMs. The throttle response improved too. That was my experience.

Been using Amsoil since 2007

The Cummings ISV 5.0 engine is prone to engine problems. I’ve been using this oil and the oil samples I send out always come back with great ratings. They tell me very low ware and all the readings are well below range. I highly recommend this oil.

Expensive oil but good . I run it in my 12 valve Cummins in the wi winters

I have been changing oil on multiple vehicles for over 50 years. After much research I decided to switch to Amsoil starting with my 2025 2500 GMC AT4X Duramax. My first purchase was on line from Amsoil and my second purchase was from a local distributor. Both experiences were flawless and with the online purchase I never left my house and the delivery was quick and on time. I will continue to purchase online as the entire delivery process was as promised. The packaging was as expected. No complaints.

I have been using this product since my GMC w/ diramax was new in 2012. I change the filter and top off at 7500 miles and change oil and filter at 15000. The truck now has 275k without any lubrication issues.

Great product! No more ticking sound!

To use this oil in conjunction with the EA098 filter and change every 15,000 miles. I feel confident this will help protect my 6.7L diesel engine better than any other products.

Running this oil for a while. Ran to 10,000 miles and sent sample in and they said to go another 5,000. I’m satisfied. Also run Amsoil in the Harleys. Definitely worth the money.

I attribute my 265,000 plus miles on my 2002 chev. 2500 HD 6.6 to AMSOIL I use the 1540 synthetic and the AMSOIL oil filter I get 8000 plus miles between oil changes saves me money

Best oil and product been using since I purchase my truck