Stanadyne Lubricity Formula | 2 Pack of 1/2 Gallon (64oz) Jugs | Each Jug Treats 500 Gallons of Diesel Fuel | Part # 38561

Used this in my Duramax for 20 years (over 500,000 miles) Zero issues with the fuel system.Using in my new HD now!

It seems to be working fine in my 6.6L Duramax

The previous owner of my 204k mile 7.3l van said he put this stuff in it religiously. Not one to change the vehicles diet, I buy it and put it in religiously as well. The van runs so good, it's hard not to keep using what seems to be helping to keep it going.I do re-bottle it into a bottle with a built in measuring device, which I have marked on the front how much to use at each fill up. I'll try to remember to come back and update at 500k if she's still runnin'

I bought this based on Intellidog's recommendation and have been using it for years. There isn't anything that man doesn't know about Powerstrokes. His advice has pulled my chestnuts out the fire more than once.My 2002 7.3 Powerstroke Is still chugging. Replaced the injectors with Motorcraft remans at 500k.I also use a bottle of Stiction every 3rd oil change.

One of the additives I use regularly.

It is used on every military diesel so you know that it has been well tested. Also it is relatively inexpensive.

so far so good with my diesel truck

Whole fleet of trucks started to have issues after using the product.