Customer Ratings & Reviews

Used for my F450

IN A DODGE SPRINTER

Use in my 2003 Ford 6 liter powerstroke engine and tractor No problems with the engines and provides great value

I have changed all fluids to AMSOIL. The oil viscosity is superior to any on the market. I do the recommended oil change to may 2500HD Duramax. Even after a 10,000 mile oil change the lubrication in the oil is still as if it were brand new. AMSOIL is the best to run in any motor. Give it a shot you have nothing to loose with using AMSOIL products.

I live in a cold climate and have never had to use engine block heaters in winter.

I have three diesel trucks and five diesel tractors, and all are serviced with Amsoil products. Besides extended oil changes, my engines stay clean and trouble free. I would never consider using anything else.

Increase oil pressure and smoother idle.

I have used this oil for over 18 years in a 7.3 diesel ford-350 4x4 and have had great performance in using it .The engine doesn't have to work as hard with Amsoil synthetic oil 5-40w it runs cooler and less RPMs for the same speed as other oils . If you're not using Amsoil synthetic oils in your engine and truck and or other motor vechicle your missing out on the best performance your motor Vechicles can give you ..

I really appreciate the ability to use the "My Garage" to identify the products and capacities listed for each of my vehicles. That with Amsoil's excellent write ups on their products gives me a piece of mind that I have the right fluids for each vehicle. This oil has all the additives my old truck's diesel needs to stay running for another 250,000 miles.

looks good. I will need more time to fully evaluate it.

Premium oil for a premium price. Works out in the long run for me with extended drain intervals. I use it in all my diesel business trucks.

I use amsoil in all my vehicles, even my lawn mower. This stuff is the bomb, less oil pressure due to better flow, and smother running etc...

Great oil for you engine can't go wrong with full synthetic. Other then manufacture recommendation on oil brand this is the only other brand I use. I'm still old school so 5k oil intervals is cheap insurance for a $67k truck. Oil itself is amazing compared to previous oil used at 5k miles drains Amsoil looks and feels great. Smoother engine idle and smoother engine operation at higher rpm range. I have a digital psi gauge installed and with Amsoil the engine oil psi has maintained same psi throughout the oil intervals the oil temperatures has dropped 8 degrees lower under same driving conditions. I know that's not a professional oil analysis but it's what I've got.

My 2016 F350 6.7L runs smoother on this oil

Excellent fluid, haven't used anything else for years, thanks

Amsoil is an ansome products.

I notice a big difference in mileage and how the truck ran after changing the factory oil to Amsoil. The mileage is up over brand X that I replaced. I've used Amsoil in all my diesel trucks, no complaints!

I have used this oil for many years in my 3500 GMC. A recent trip of 11000 km with the 25000 mile oil filter did not change the color of the oil it was still as if it came out of the container. Excellent starting in cold weather

Great oil at better than dealership prices. Why wouldnt you?

I don't know if my 2013 Ram diesel is protected better by using Amsoil motor oil, but I trust Amsoil research. I believe what Amsoil claims. I can only say this about Amsoil. Only time will tell as the engine ages.