I have use this oil for years in my tractor that stays out in the cold. Have never had a problem starting it.

I have used AMSOIL top grade diesel oil and the dual filter system in two GMC pickup trucks and have had no oil related problems with once per year oil changes. I have towed a 10,000 Airstream travel trailer over 200,000 miles during that time. I did regular oil analysis during the first 5 or so years, and never gol a recommendation to change the oil after 12 months of travel. I have condensed several people to make the change to a setup like mine for their tow vehicle with no complaints from any of them.

I have a rotella 15-w40 oil in my car because people around here where saying the is the best for diesels and after using asmoil I found out the motor got quiet , smooth and idles better also gets better Milage So after finding this Amsoil oil i will never go back to use a different brand Give it a try and see for your self

I put this in my tractor and is great! The tractor is exposed to heavy loads, dirt and dust and high RPMs. Oil is great under pressure and delivers.

The signature series 5w-30 diesel oil for the newer dodge rams are the very best oil you can purchase. This oil has a wear protection capability of 105,000 psi. The best oil 540ratblog has tested for our Cummins engines. Google 540rats blog with 1 million views and learn more about engine oils. Xpensive oil but worth it! I change my oil once per year or at 7500 miles, I am running a bypass lower micron oil filter kit in addition.

Lower oil temperature and pressure

Only oil I use in my fuso diesel truck. Delivered to my door fast

Amsoil diesel oil is the only oil ever used in my 35 year old Kubota L2850 4WD tractor. All other fluids have been Amsoil as well and changed per user manual specifications. With 2500 hours on the clock this hard working tractor has never skipped a beat. No smoke. No problems. What else is there?

Since i bought my new truck i used this oil and is so amazing . Also the shipping is fast as f….. never problem with them . All in order and clear .

My Kioti. cK35 hat is 8 years old and after it’s breaking period all I’ve used is Signature Series Diesel oil . It’s starts like it’s summer time even when the temp is zero . I’ve been using Amsoil in all my vehicles,including motorcycle, lawn equipment , side by side , truck , etc since 1979

I use Amsoil in all my vehicles, truck, boat, side by side Mules for well over 10 years and so far have never had any issues.

Because diesels are very hard on todays oil with huge amounts of soot buildup in a very short time, I want the best oil available for my diesel. That’s why I use only Amsoil max duty.

Great oil for gas work trucks, I like the fact that I can go 15000 miles between oil changes, and thats driving part time in the dirt. The additives in this oil seem to help with cold starts when the oil has 5k or more miles.

I use this in a 2012 vw golf tdi and it has never ran better.

Good so far Can’t complain

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Had a overheating problem with my 2001 Dodge and I used the ams oil 5w30 synthetic oil and a water pump from a 6.7 and haven't had an overheating problem towing, I know this wasn't a complete fix by using the oil but when I used the thicker conventional oil I always had this problem so I highly recommend this product.

Using this oil from mile 1 on a truck. Right now 400k. So far so good. And compared to same trucks in a fleet using other oils, mine doing much better

The dealer I bought my truck from uses this for diesels. I have used it since and it holds up well. Very quick delivery, too. Cheers.