Opti-Lube XPD All-Season Diesel Fuel Additive - Gallon (2 Gallons (Treats 1024 Gallons))

This product is recommended for older diesel engines. My 2003 Silverado 2500 HD has been using it for the last 10 years and the fuel injectors have been going strong ever since. I compared gas mileage with and without the additive and it looks like it’s better by 4mpg better with it. This was a 2 month test tracking mileage and fuel used with and without the additive. A rudimentary test but good enough. Most important was not having any engine problems in the past 10 years. Not bad for a 22 year old 3/4 ton truck with 200k+ miles.

Quality product fast delivery. Will use again

Use with every fillup for the last 50,000 miles in my 6.7 powerstroke. Great preventative maintenance

Great all in one additive

This product was tested and results published by the South Texas Research Institute in Texas. This product was #1 in lubrication improvement for diesel fuel. If you're buy some "secret sause" you might want to do some research. They list around 10 different products, I have a 20 plus year old duramax and love this stuff.

Abusing price, I guess because they know it works, I would recommend opti-lube even though I have use it only a few months, I get better mileage and give me peace of mind, knowing that it is protecting my expensive injection system by lubricating it’s internal parts extending its life . Recommend by the Oil Guru in YouTube ( I own a Diesel truck with a Cummins engine 6.7 )

Good stuff!

I really did feel the difference, honestly it even made me find issues with my truck because it got a power increase..... Seems good for sure.