Is what my mommy used to tell me, and like a good cup of coffee for a pick me up. 2016 Chevy Colorado Baby Diesel towing 6000 lb camper like a bad boy.

Very effective in all diesels. Noticeable difference when you follow directions on bottle.

Have used it for 4 fills, have had no issues

There is no real way to know how well it is working. However, the Amsoil reputation is enough for me .

I’ve gained a 10% increase in mpg from the on board computer and have hand calculated it to a 9% increase. I have a 33 gallon tank so I pour half the bottle in with each fill up, works out perfectly.

Been using this product for about a month now. I has increased my MPG by 2 MPH. Less smoke, and more throttle response as well. Seems to be working as advertised. Happy with my purchase!

A company that still believes in quality of products and performance. Amsoil stands behind its products and customers.

Using in a brand new Gladiator Ecodiesel, adding at recommended dosage for maintenance. I can’t say I have noticed any difference in performance at this point as it is to early. I want to stay ahead of any issues. I may use a heavy clean dosage every fuel filter change out going forward as well.

Have seen a few mpg increase. Although small the truck runs smoother and quieter.

I had just came back from a trip pulling an RV with my 2014 RAM 3500, 6.7 Ltr engine, and got (average) 9.8 miles per gallon of diesel fuel. Next trip, same route, same RV, and my 4500 mile round trip, upped the fuel mileage to 12.4 miles per gallon. Driving with no load in city and highway, my mileage is steady at 23. One longer trip on the freeway was at just under 29 MPG. Alas, now I've parked my truck as fuel costs are too high to take RV vacations.

I have used the diesel injector clean & cetane boost as well as all in one in the winter, both products work great, improve performance & fuel mileage. I also use Amsoil lubricants in just about everything we own, never disappointed. Great Products!

Add it at every fill-up

Great Product! I have enjoyed a 1-3 mpg increase depending on highway or city driving. Smoking has decreased when "Rolling Coal" , engine starts better in colder weather. Running a HEUI fuel system in a 6.0 and using Amsoil heavy duty 15W-40 I will get as much mileage as possible out the fuel system.

Used on my 2010 duramax gave smoother idle and quieted injectors down great maintenance item

I love the product but If I dont use the whole bottle I close it tight and it leaks--I cannot carry it inside my vehicle for the smell

Good cuality

Using in my Sprinter van. Works great and seems to improve fuel mpg. Will keep using it!

After one treatment the injectors are quieter and the engine feels smoother

SUPER PRODUCT. CAN TELL A BIG DIFFERENCE IN MY CLASS A MOTOR HOME. 300HP CUMMINGS, TWIN TURBO. 2006 ENGINE, 35,000 MILES. RUNS LIKE IT WAS NEW. CRUISE AT 75 MPH ALL DAY LONG. JUST HARD TO STOP A TRAIN!!

I truly believe in this product combined with 15/40 signature series oils. My Cummins dip stick stays supper clean at 15k mikes intervals. 100% legit