Customer Ratings & Reviews

I use this oil In my dmax

Love the extended drain cycles. I ran my truck for 10,000 miles before I drained it. Next time I will do an oil analysis to see if I can go longer

The reason I went with Amsoil was because I tow heavy up the mountains and wanted a full synthetic that I knew I could depend on. This full synthetic 15w-40 does everything I need it to. Keeps my engine running like new and I only have to change it every 10,000 miles. Awesome job, you definitely have a lifetime customer!

Amsoil is the best synthetic motor oil I have used period. I use this in all my trucks and equipment and with very high miles and high hours. Each and everyone operates excellent.

I have been using Amsoil Diesel marine oil for over 10 years on my 2004 Dodge common rail I have no complaints for the price I pay for....(You get what you pay for) Good product no leaks,overheating,knocking or any issues with oil. 123,000 miles and going strong.....Even my diffs and trans use Amsoil...

Amsoil is used in my truck, suv's, compact diesel tractor, garden tractor, roto-tiller, pushmower, and snow blower. I service small engines and yard equipment as a hobbie. Amsoil 4 Stroke 10w-30 is an amazing product. All of the Amsoil products that I use are high quality and a great value. You get what you pay for.

The only oil I have ever used that frees up extra horsepower

This is a fantastic oil. I love the fact my oil change intervals are longer. I have been using this for many years. Almost have 200,000 miles on my 7.3 liter and its still going strong.

Drive a lot this product seems to help truck run smoother

AMSOIL is truly the best real Synthetic oil out there and i will not use any other oil for my trucks and cars. Thank You AMSOIL for standing by your product and so do I ! Kevin Broyles

Run my offshore boats Hard, keep them at running for hours at 5500 rpm. My custom built diesel truck tows all over the country carrying heavy loads. Run the Marine amsoil in both. Blew a coolant hose pulling my offshore boat from Bodega bay , ran for 27 miles with no coolant till I got home. Diesel never once thought about overheating.

Used for years in truck.

I have been using Amsoil lubrication in all of my cars, trucks, tractors and compressors since 1974. I am very happy with the results I have had with Amsoil - higher mileage, better cooling due to less friction and longer oil change schedule.

I have a 1982 Diesel Westfalia with a 1.9TD engine. I am almost scared to try another brand and definitely never another grade of Oil. I did that because at the time I was on vacation and I couldn't find the Amsoil product. Within one tankful of diesel I lost my turbo. Also, I also cannot find any other reason for my decreased mileage when I did switch brands. I admit I am a bit anal about my old Westy but with careful, consistent driving I can resolve all the variables. Despite the difficulty in finding a local supplier and the increased expense verses using a local sourced brand I will always choose Amsoil brand. Having gone through 3 engines from other causes, it's just not worth the risk to switch. Thank you Amsoil.

I have been using these products for many years in gasoline and diesel applications. Big plus is the ability to set and forget for a year is quite nice. With having multiple vehicles in my driveway and having to work on many others means my maintenance needs to be transparent to all of the other work. This product in particular has kept my engine safe and worry free. My truck is from the showroom floor in 2003 (6.0l) and she is not allowed into the shop accept for programming or tires. Those are my rules as well as for all the rest in my driveway. I will not accept inferior products. Thank you Amsoil.

I've used Amsoil for over 40 yrs. starting with my 1st VW diesel around 1973 and never had a worry.

My 1996 Ford F-250, 7.3 Powerstroke never leaked oil until I started using this product. Only 137000 miles. Works well in inboard boat engine.

This weight oil sounds a bit to light for a worked hard off road machine, but it's what the AmsOil gurus recommended so that's what I run!

I have been using this in my 5.9 Cummins for four years now. I gained 2 mpg since changing all of the fluids over to Amsoil.

I really like this oil. I was using Rotella and burning a gallon every 2 weeks. Since I switched I don't add any oil throughout the 500 hour service. I also get better fuel mileage. I was averaging around 4.8-5 now I average 5.5-5.8