Diesel-Mate - All Seasons by Certified Labs

Curious if anyone has tried this fuel additive (or others) and seen any real improvement. The Certified Labs sales guy is trying to get our company to use it for our fleet of tractor trailers and gave me enough to treat 250 gallons. Going to give it a shot - nothing to lose except potentially clogging my fuel filter. I've been tracking my mileage for a year now, so have a good baseline.

They claim up to 7.5% increase in fuel mileage and 15% cetane increase.

http://diesel-mate.com/additive-package-and-specification-data.html

I use PS white, but not for FE. Lots of good threads to read if you really want to get into it. I suspect you will not likely see a 7.5% FE increase from the effect the additive alone.

http://forums.tdiclub.com/showthread.php?t=196059&highlight=additives
http://forums.tdiclub.com/showthread.php?t=106817&highlight=additives
http://forums.tdiclub.com/showthread.php?t=275180&highlight=additives

Likely you won’t see an increase, but since you’ve been given the additive anyway it’s certainly worth a try. Cold in my opinion is the biggest mileage killer. The engine takes longer to reach operating temperature and because of that is less efficient.

Keep this thread updated with your results, the salesman at least seems to have confidence in it if he’s giving it away.

Just note that the product linked is a demulsifier, so it's good to read up on how additives handle water in the fuel, and which camp you fall in for treatment.

http://forums.tdiclub.com/showthread.php?p=3686717&highlight=demulsifier#post3686717

http://forums.tdiclub.com/showthread.php?p=5054560&highlight=demulsifier#post5054560

Snake oil!
Just like the official Mpg posted on cars at the dealer.
Those figures are obtained in a closed environment, air conditioned, no head wind etc. Also only the powered wheels are on a dynometer at no more than 50 Mph!

You can put anything on paper!