Diesel additives : your .02 ? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 04-20-2011, 05:42 PM Thread Starter
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Question Diesel additives : your .02 ?

Ive been using Howes for years; was told to use it so the injector seals wouldn't go to hell. Has anyone ever seen an increase in fuel economy with any of these additives ? Ive never checked , I use the stuff out of nessesity

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post #2 of 6 (permalink) Old 07-29-2011, 10:54 AM
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Check the safety sheets to see what is in the product.

I run 2cycle - one oz per gallon, it gave a 3 mpg increase on the Isuzu and I have used it on the Dodge since purchase. Made a noticeable difference in the sound on both.

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post #3 of 6 (permalink) Old 07-29-2011, 04:31 PM
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I worked on engines all my life and every time there is the next greatest thing to do with additives it has been proven to be a pile of crap.
There is a fuel lubricity study/test I have it printed out and is in my shop 2% bio fuel was the best. Most additives when added had less lubrication than the base fuel.
I have added an anti gel additive to units that had summer fuel in them.
In all my years as an mechanic when a customer comes in with an injector problem, Never, not once has one ever said he added an additive, why would that be, all these guys that swear they add all these fine products, lets see if one just one can show a w.o. hard copy, with the statement they add an additive.
The same guys that preach all the additives are the ones changing injectors, Why would that be?
Show me one W.O. with the statement you add any additive be it oil even windshield washer fluid it just never happens, Why because deep down they all know they are crap.

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post #4 of 6 (permalink) Old 07-29-2011, 06:17 PM
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post #5 of 6 (permalink) Old 07-30-2011, 07:27 AM
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Thedieselplace ran a bunch of lab tests - filters, oil additives; they are gm centric but the results show that most additives hurt lubricity.
Two % biodiesel was one of the best, 1:200 2cycle was 7th - I think - not the 1:128 used by people that run old iron that they no longer make fuel for. The first step in sulfur reduction about '94 caused a rash of injector pump repairs. The fuel lubricity numbers at 1:200 meet the design for pre '94 injection equipment.

I did not look for the lubricity design of the '94 to '07 equipment but the industry did not get the lubricity numbers that they asked for and the pipelines won't ship formulated fuel because it contaminates the jet fuel, so the tank wagon drivers are supposed to add it when they load from some fuel racks.

If biodiesel was not an 80 mile trip I would use that.

Some of the most expensive stuff did the worst on the tests, go figure.

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post #6 of 6 (permalink) Old 07-30-2011, 04:13 PM
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When they reduced the sulphur in fuel, there were fuel leaks on PT fuel systems throttle shafts. I cost about $200.00 to have the seal changed, more if it needed other work, most just exchanged it for a rebuilt about $300.
Manufacturers new about the changes years ahead of time and there was no major problem, I would say I saw maybe 10 and all were Cummins.
What is not mentioned is the number of engines that use to have burnt valves, and when you removed a head for a head gasket leak would need a valve job. turbo's that had the turbine damaged from sulphur pieces coming loose.
I remember the BS that was spread when the took the lead out of fuel, I had customers that had perfectly good engine apart to put in what they called a propane kit, new seats and valves.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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