My brother is a truck driver and when I bought my sister-in-law's Dodge Ram from her he told me to always use the diesel additive/stabilizer/octane booster stuff and keeps the diesel from gelling.  Right now the name escapes me, but it comes in two types.  One is in a square white bottle and the other in a silver square bottle.  He swears by it and since my raggedy old truck is still going, I guess I kinda do too.

Course I'm open to hearing what everyone else has to say.  Good, bad?  Any better suggestions?  Anything that saves diesel and wear and tear on my Cummins I'm open for. 

The Cetane(sp?) stuff?  I use that and I've actually got a bit better fuel mileage with it but it doesn't say that it is a stabelizer.  It just talks about they fuel milegae and non gelling properties.  (and yes, I paid extra for the talking bottle!) 

Went out and found the bottle.  It's the white one that says diesel fuel supplement + cetane boost.

If you run your truck once a month you should have no problem. Gelling is caused by cold temperatures in the winter. I've used a product called Stabil in cars and one diesel tractor that I store unused all winter, with no problems in the Spring. During the winter my truck and one tractor are used infrequently, and with no additives besides Marvel Mystery Oil, I have never had any fuel problems.

Gard

Moving further north is why I started using the PS in the tank.  I've always lived in a warm.... well ok, hot climate and was parinoid about the truck starting and the diesel gelling up.  What is the marvel mystery oil?

Thanks for all the info by the way.

Stabil is a product I've used for a number of years. My boats are stored 7 months a year, my diesel lawnmower is stored 5 months a year, two of my cars are stored 6 months a year. Using this product, none of these engines has had a fuel gelling problem or any contamination issues. Restarting the motors after storage is immediate, and there are no driveability issues.

When I first started working as a mechanic on imported cars, Mercedes diesels had injector issues, with contaminated tips causing spray pattern problems. The fix was to pull the injectors and manually clean them every 20k miles. We started to recommended that the owners, add some Marvel Mystery Oil to every other tank of diesel fuel. They did, and every owner that had their injectors checked at the next maintenance schedule, had clean injectors. The manual cleaning was stopped for the owners using the oil additive.

Using this additive in every diesel I've owned since, has become the norm for me. In addition, with the new diesel fuel, the additive that lubricates the injectors has been reduced. Just as when unleaded gas became the norm, new cars had to have different valves and valve guides installed, to make up for the lack of the lead lubricant. My PS diesel is of the old design, and I want the injectors and valves to have the best protection I can afford.

In both of my old cars and my four diesels, I routinely use the Marvel Mystery Oil as a top cylinder lubricant and cleaning agent. It has worked flawlessly.

With these two additives, I have had no fuel maintenance issues of any kind, in any number of engines.

Gard

A waste of money...

http://inchoate.harm.org/~halbritt/dodge/Diesel%20Fuel%20Additive%20V3.pdf Check Page 9!!

And if you have a GM Duramax...NO additives are required or acceptable under the warranty...

Since my diesels aren't technically modern, and these products have proven their worth for me in both gas and diesel motors for many decades, I will continue their usage.

Gard

Thanks for all the info ya'll.  We got the motorcycle because the payment, insurance and 2 tanks of gas (3.7 gallons) is cheaper than the 2 tanks fof diesel I was going through every month.  And after 2 years its paid off and we have something to show for all that money we spent!!

I hate not driving my truck, but I HATE paying $4 a gallon for diesel.

My truck is a 2002 Dodge 2500 and it does that too.