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Old 06-10-2012, 09:12 PM   #1
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For those of you who own DP's, do you add anything to your fill-up's of diesel? With every fill-up? And what do you prefer to use?? Thanks for your input.

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Old 06-10-2012, 10:04 PM   #2
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I'm going to get burned at the stake for admitting to this crowd that I use an additive, but I like Opti-Lube Fuel Improver | Oil Fortifier | Block Grease . Read their information on fuel quality and lubrication. I use a third of an ounce per gallon and mix it at a half ounce to a gallon on fuel ups where I know I'll be doing some hard climbing. I've been running it for over 3 years. It does add to the bottom lone of your fuel bill.

Before everyone posts the statements from Cummins and Cat about no additives, save your typing, it's been said all before. It's a personal choice that I make.

Don & Mary
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Old 06-10-2012, 10:57 PM   #3
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Opti-lube is rated #2 diesel fuel additive in this HFRR test Lubricity Additive Study Results - Diesel Place : Chevrolet and GMC Diesel Truck Forums. I have difficulty finding it on the road, and usually wind up buying FPPF diesel fuel additive (1 oz to 30G) which is #3. Number 1 rated is B2- bio-diesel blend.
The bottom line, the test results plainly show an additive is needed for engine longivity.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"
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Old 06-11-2012, 02:49 AM   #4
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I add 2 oz of acetone to 10 gals of fuel for better mileage and cleaner burn.
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Old 06-11-2012, 04:59 AM   #5
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Opti-lube Summer Blend for lubricity enhancement (my engine is a 98 mechancial C8.3 Cummins...ULSD was not even in existence when it was manufactured).

Valvtek Microbiocide due to the high humidity here in S. Florida.

Both are cheap insurance as I have not had any issues with the fuel delivery system (lift pump) or clogged filters.

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Old 06-11-2012, 04:59 AM   #6
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Opti-Lube here on a Ford 6.7. The fa t that lubricity/centane is all over the place depending on where you get fuel.
I found Opti-lube recommended over on some of the Ford forums. For those of us that can not follow the warm weather, they do have a winter blend.
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Old 06-11-2012, 01:56 PM   #7
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Clean fuel (lots of it) goes in my tank, nothing else.
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Old 06-11-2012, 02:14 PM   #8
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I rotate between SeaFoam, Lucas Fuel Treatment, Power Service & Marvel Mystery Oil Mix about (3) times a year or during an impending hard run. Whatever is on sale of those mentioned is the determing factor in what I buy/use at the time.
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Old 06-12-2012, 03:41 AM   #9
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Raycor Biocide per instructions on the bottle to control algie in every tank, no filter problems ever. I get it from the local diesel shops any marine (boat store) should have a comprable product. Be careful what product you buy some of them will turn the fuel red the color of off road diesel.
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Old 06-12-2012, 04:54 AM   #10
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Nothing. When we fueled up at the end of the fall season then took off for a month in the dead of winter I used to ad an anti-gel. Now we are gone before it gets that cold and don't return till it warms up.

We store it with the tank as full as possible. If we stayed in one place parked long enough that had sustained very warm temps I would be using some kind of bio-guard to prevent algae growth in the tank.

We try to fill up somewhere that is busy enough to have fresh diesel. Truck stops work for that, I am suspicious of mom & pop stores.
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Old 06-12-2012, 05:45 AM   #11
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XPD + Cetane at every fill. If going into a heavy pull area, I add the max recommended amount of Cetane.

My choice, my money.

Best to all, be safe, have fun,
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Old 06-12-2012, 06:50 AM   #12
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Here is something to think about. Almost all large trucking companies ban the use of additives that "improve milage and lubricate the motor" because in the millions of miles they travel they have found no advantage in MPG or engine life and no cost savings. Cummins actually did some testing with their motors on a engine dyno to see if any power was gained and the answer was NO. As far as lubricity of fuel I personally believe that is a sales trick to get everyone worried. Again long haul trucks for big companies do not use any.

I tried some fuel additives in my MH to see if any MPG on a trip that I make all the time. I know exactly how much fuel it takes to go from Atlanta GA to Brunswick ME and I have done it many times and have a very predictable amount of fuel used. I tried these MPG improvers and found no improvement that was measurable. Compute out how much MPG improvement you would need to pay for that additive per tank and see what you would need to pay for it.

The only additive I use is to control black slime while the mh is not being used.
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Old 06-12-2012, 07:32 AM   #13
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Ok, I am going to throw something else into the mix. Has anyone filled their diesel tank with Bio-diesel yet? It is turning up at the Flying J's/Pilots and several folks have been stranded on the side of the road with clogged fuel filters. Bio-Diesel as I understand it has more water in it, has some kind of cleaning stuff in it that causes stuff in tanks to loosen thus clogging filters. Not on that but it burns faster getting less mpg. Based on nasty things I have read about it, I ordered spare fuel filters and Biobor JF Diesel fuel treatment. Guess I will be using an additive now.
Mel (Melanie) and Harry
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Old 06-12-2012, 12:00 PM   #14
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Hi Mooseguy,
I use Stanadyne Performance Formula. Go to Performance Formula - Stanadyne and read about it. The net cost to me is 0. From the first tank to current, the additive performs as advertised. I forget the exact numbers, but the MPG increase was around 9/10 MPG. If there was no business case I would not use it.

For those who bring up the trucking industry as an example of why no additives are used, that excuse is flawed. I was a consultant to the trucking industry back in the 80's. The bottom line is if the savings required driver's to take any action, the company rejected the product. Simple as that.

The diesel fuel component part of Stanadyne has been in business for over 60 years. Their main businesses are in diesel fuel system components (injectors, pumps, etc.).

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