Diesel Additive

[filrupmark]

What type of diesel additive would be good for keeping injectors clean,moisture control and maybe added cetane & lubricity. What do you use.

[kampinguru]

jason4598 wrote:
Stanadyne

X2

[BoonHauler]

Raften wrote:
Add some biodiesel.

x2

Lubricity Additive Study

[Redsky]

Seafoam makes stabilizers to use if the fuel is going to sit in the tank for a long period of time. If you have a pre-2008 engine then a lubricity enhancer is not a bad additive to put in the tank. No need for a cetane booster unless you want to drag race or do sled pulls with your RV.

As for water it is important to maintain the fuel filter and water separation unit and drain it periodically. Different for each engine so learn where yours are located and read the manual as to the maintenance required. And avoid biodiesel if at all possible and never put in B20.

[drc5900]

NinerBikes wrote:

drc5900 wrote:
Marvel's Mystery Oil year round.
Diesel Kleen White comes fall & winter.
And when it gets around 20 below zero or colder, isopropyl alcohol in addition to the Diesel Kleen White.

You may call me Doctor Overkill, that's okay, but I haven't had any fuel gel up or fuel lines freeze yet in Minnesota winters.

No engine issues in 300K+ miles. Other issues, yes, but never engine issues.

Adding any alcohol to a Bosch HPFP based Common Rail diesel is death to the High Pressure Fuel Pump. Anything that is operating at 1600 to 2000 bar pressure can not afford loss of lubricity to the fuel on American standard D2 diesel fuel. Don't do it, if you own a newer diesel truck or VW or Audi or Porsche Cayenne TDI.

I have the mechanical Bosch P7100 Fuel Pump on a Cummins 12 Valve Diesel Engine. Besides adding the alcohol, I also add lubricant.

What do you do to keep the moisture out of your fuel?

[mlts22]

Here in Texas, the only two additives I would bother using are a biocide (especially with B5 common and B20 becoming more so), and an anti-gel come winter.

[NinerBikes]

drc5900 wrote:
Marvel's Mystery Oil year round.
Diesel Kleen White comes fall & winter.
And when it gets around 20 below zero or colder, isopropyl alcohol in addition to the Diesel Kleen White.

You may call me Doctor Overkill, that's okay, but I haven't had any fuel gel up or fuel lines freeze yet in Minnesota winters.

No engine issues in 300K+ miles. Other issues, yes, but never engine issues.

Adding any alcohol to a Bosch HPFP based Common Rail diesel is death to the High Pressure Fuel Pump. Anything that is operating at 1600 to 2000 bar pressure can not afford loss of lubricity to the fuel on American standard D2 diesel fuel. Don't do it, if you own a newer diesel truck or VW or Audi or Porsche Cayenne TDI.

[wolfe10]

Per Cat and Cummins, there are two times that additives are recommended:

Storing summer grade diesel (#2 diesel) into below freezing temperatures. So if you fill up in the summer or fall, this could be an issue. BTW filling up before storing is HIGHLY recommended as it reduces condensation.

The other recommendation is if storing diesel for over 2 months in summer or 3 months in winter, add a BIOCIDE. You can find them at any marine store, as boats have the same fuel storage issues as do motorhomes.

[drc5900]

Marvel's Mystery Oil year round.
Diesel Kleen White comes fall & winter.
And when it gets around 20 below zero or colder, isopropyl alcohol in addition to the Diesel Kleen White.

You may call me Doctor Overkill, that's okay, but I haven't had any fuel gel up or fuel lines freeze yet in Minnesota winters.

No engine issues in 300K+ miles. Other issues, yes, but never engine issues.

[camperpaul]

gswcgi wrote:
I have spoken with factory technicians at Caterpillar and Cummins and they both say not needed!

Untreated Diesel fuel gels at 26°F.

That is why the owner's manual for my Sub says to use an "anti-gel" fuel treatment when the temperature is expected to be below 30°F.

[gswcgi]

I have spoken with factory technicians at Caterpillar and Cummins and they both say not needed!

[filrupmark]

Thanks for your opinions . Oh bye the way I have a 2004 F250 6.0 . Mine has been great!

[tvman44]

Diesel Keen will do all you ask. 🙂

[NinerBikes]

MinnCamper wrote:
Diesel-Kleen. Sliver in summer. White in winter.

Since I own several VW common rail diesel TDI's, where moisture in your fuel in bad juju for the whole fuel system, I add Power Service Fuel Supplement White bottle year round, to keep my fuel dry. I rarely, if parking overnight, let my fuel tank get below 1/2 a tank, to prevent condensation forming in the fuel tank and getting water in the fuel, since with rise and fall of temperature, the fuel tank breathes moist air in.

Also, every year, without fail, with the first frost of the year, I R&R my fuel filter, and before doing so, I double dose with Power Service white and run the fuel tank almost empty, do the fuel filter change, then top off the tank with another double dose of Power Service white bottle.

Take the moisture out of your fuel system, every fall, completely, and you'll never freeze up your fuel filter with water in the system, come every first couple of frosts.

[KD4UPL]

I used to drive a truck, a Mack CH with 500HP. We didn't use any additive. I currently have 180,000 miles on my '05 Duramax. The engine has never given any trouble and I've never used an additive. I used to own an '07 Duramax. I had no trouble in nearly 40,000 miles with no additive.
I don't see the need to spend the extra money just to burn it out the tailpipe.