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Old 09-18-2011, 08:10 PM   #1 (permalink)
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fuel additive in 6.7

I have a 2008 6.7 wondering if i should use a fuel additive or not.
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Old 09-18-2011, 08:32 PM   #2 (permalink)
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I use Howe's in the winter, other than that additives aren't necessary. I don't use it for lubricity or cetane, just anti-gel.
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Old 09-18-2011, 09:09 PM   #3 (permalink)
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I use a little 2-t oil per tank.I did it in all my previous diesels and I will do it in this one. I ride dirt bikes so 2-t oil is always near. I use the howes in the winter.

From my previous searches "most" people dont use additive other than winter, some dont even then depending on location.
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Old 09-19-2011, 02:19 PM   #4 (permalink)
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I don't use any additives regularly, but every now and then I'll pour in some Power Service Diesel Kleen to try to keep things clean. Never had a reason to add it for lubricity since the CP3 is designed to run on ULSD.

I would suggest anyone running a stock 6.7 with DPF stay away from 2-stroke premix, and really I see no reason to run it in a 6.7 in any state. Lubricity is not an issue.
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Old 09-21-2011, 03:33 AM   #5 (permalink)
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I throw additive in mine but mainly because my truck only gets driven on the weekends at most. Unless I take it on a trip, it will get driven maybe 20 miles in a week. Recently, I have been using RSD additive. Prior, I used Power Service. Both seemed fine. I havent really noticed a difference when running them or without an additive. More of a peace of mind type of deal. For how cheap it was, figured why not.
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Old 09-21-2011, 06:19 AM   #6 (permalink)
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I run power service mostly for the waster. I hat a bad load of fuel in my last truck and it cost me over $10000 to fix. I know it wont stop a bad load of fuel but the newer common rail systems are less tolerant of moisture than the older diesels
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Old 09-21-2011, 12:00 PM   #7 (permalink)
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I've tried several.

I've tried RBP, Amsoil, Power Service, and Howe's. I use additives to prevent gelling and water dispersion.

RBP is 1 ounce/30 gallons. Does not sound like much. I could not tell the difference. Not mileage improvement or performance. Probably nothing more than placebo.

Amsoil Cetane Booster. I could not tell the difference. Perhaps I've reached additive saturation and won't feel anything else short of nitro drag fuel.

Power Service. Gray for spring/summer, white for fall/winter. Another one where I don't feel or see any performance benefits--but if my engine is running as it supposed to then I shouldn't perhaps feel anything. It's been around for years and I use it for winter to prevent gelling. Their "911" red bottle is for de-gelling. We start mornings at 28-32 degrees in the winter and I have never had gellinig issues using the winter Power Service. I suppose mixing a quart of 911 red into a gallon of white stuff would be good insurance for those road trips to Montana or Wyoming or Idaho in the dead of winter.

Howe's. Vintage looking bottle. I tried it on my last road trip this past June across Utah/Nevada. I could swear that it quieted down the Cummins. The 2010 6.7L Cummins is not loud like the 24v, but it just sounded smoother, more of a very pleasant low smooth baritone. Was this my imagination? But it sure does sound different than any of the above additives. Power Service is readily available in truck stops, Wally World, and assorted auto supply stores while I only see Howe's in truck stops. Howe's is supposed to be good for gelling prevention as well--use double the amount for winter per instructions.

I ain't no diesel expert so I defer to old hands. I see Power Service and Howe's having been around for a long time. I have googled both and found many folks using them for years and many swear by them. I see them on the shelves at truck stops where drivers have to depend on their rigs for a living--driving 80K miles or more a year in freezing cold and blistering hot, day after day, week and week. So i guess that if long haulers use it, I can't really go wrong with it either.
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Old 09-21-2011, 01:04 PM   #8 (permalink)
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If you're worried about cold starts in winter get the block heater hooked up. The cord is less than $20. If your worried about lubricity in the fuel run some Biodiesel every once in a while. B5 is ok as per the owners manual but really you can run much higher concentrations without ill affects. If water in fuel is what worries you then go get an airdog/fass system installed since they come with an extra water seperator in addition to the one built into the stock fuel filter.

On cold starts and gelling... I park my truck outside year round and have never had problems getting it started on the first turn of the key. No additives and no block heater either. Temps in the winter average 20's down to 0 some days. No issues unless its been sitting a few days... then the batteries protest just a little.
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Old 09-21-2011, 01:50 PM   #9 (permalink)
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I think they're all snake oil as far as giving mpg gains, and probably not anything great for adding lubricity. The companies are simply playing on peoples fear, making us paranoid of injector and pump failures, esp. since the ulsd came around.

But just the same, I use them occasionally because I believe they do keep things clean, and ofcourse I use PS white bottle in the winter to keep fuel from gelling.

This winter I'm going to experiment with a gallon of diesel in a jug, leave it untreated and see just exactly what happens to it.
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Old 09-21-2011, 02:08 PM   #10 (permalink)
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Quote:
Originally Posted by Waboo View Post
I think they're all snake oil as far as giving mpg gains, and probably not anything great for adding lubricity. The companies are simply playing on peoples fear, making us paranoid of injector and pump failures, esp. since the ulsd came around.

But just the same, I use them occasionally because I believe they do keep things clean, and ofcourse I use PS white bottle in the winter to keep fuel from gelling.

This winter I'm going to experiment with a gallon of diesel in a jug, leave it untreated and see just exactly what happens to it.
Please keep us informed on how the beta test site works out.
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Old 09-21-2011, 04:45 PM   #11 (permalink)
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Please keep us informed on how the beta test site works out.
Noooo way. Not for pot stirring, just my own curiousity.
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Old 09-21-2011, 06:27 PM   #12 (permalink)
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and ofcourse I use PS white bottle in the winter to keep fuel from gelling.

This winter I'm going to experiment with a gallon of diesel in a jug, leave it untreated and see just exactly what happens to it.
Please forgive my ignorance, but exactly how cold does it get in Oklahoma? I didn't even realize that gelling would be an issue for you guys. I live in MN and I run #2 all year round and I don't start putting Howes in my truck until it's around 35-40* for a daytime high. The only time I ever worried about gelling (with Howes on board, they guarantee to -24*) my truck sat out all day at -30*. Didn't gel, fired up with one cycle of the grid heater, but I was a little nervous that I'd have to dig out the red bottle of PS.
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