Accidentally Put gas in my diesel HELP

bfast54 wrote:
CRCR................To give you my $0.02 worth...........I had a 1994 5.9 Cummins, I bought, and being a 2 wheel drive Dually , in Northern Mi...I would only drive it April thru Oct,Nov.

I would PUT a FULL tank of Diesel in it, and let it sit, Nov, Dec,Jan..etc...........and it would Start right up, every spring no problems.

When Hauling with it, I tried many different types of additives, and I found a Slight better feel, with Power Service the ( White bottle) but mileage was hard to say, because I haul Many different size Trailers, in many diff types of comditions , wind, mountains, East cost, North , etc.....

Thats my Real world Experience .:W

Bfast54, thanks! From what I have read, the white bottle of Power Service is recommended for winter driving, is it not? I thought the grey bottle of Power Service Diesel Kleen is recommended for summer. I live in Southern AZ, so we have no real cold weather period. The most we have is maybe 1, 2, 3 times in the dead of winter, we have a very light frost overnight. Summers, well, insanely hot (which of course is why we escape to the pines at 7700' frequently in summer :).

Used to run 25 gals gas in my truck I carreid 300 gal diesel it kept the fuel from geling in alaska

K3WE wrote:

I guess the question is what damage would running too much gas cause (I'm thinking it's mostly a fuel pump lubrication issue)..

define too much gas. What ratio of gas to diesel will effect the diesel?

IMHO 9 gallons in 85 will not do it. I would guess that there will be less change than the switch to ultra low sulfur fuels.

This thread is about misfueling a diesel, not my abilities as a mechanic, or what I have learned about fuels. What you see posted under my name is my opinion nothing more nothing less.

are your posts anything more ?

Ask your question get answer from Cat:

Clicky

CRCR................To give you my $0.02 worth...........I had a 1994 5.9 Cummins, I bought, and being a 2 wheel drive Dually , in Northern Mi...I would only drive it April thru Oct,Nov.

I would PUT a FULL tank of Diesel in it, and let it sit, Nov, Dec,Jan..etc...........and it would Start right up, every spring no problems.

When Hauling with it, I tried many different types of additives, and I found a Slight better feel, with Power Service the ( White bottle) but mileage was hard to say, because I haul Many different size Trailers, in many diff types of comditions , wind, mountains, East cost, North , etc.....

Thats my Real world Experience .:W

Tom/Barb wrote:

naturist wrote:


Gasoline burns hotter in a diesel engine than diesel fuel does because instead of a controlled slow burn, it explodes suddenly. This is because the mixture of gas and diesel does not ignite instantly, but builds up briefly before the diesel part catches fire, thus setting off the gas part. If you fueled it with pure gas, it would never fire, but the mixture does ignite, and then the gas part explodes. The sudden release of energy in a very short amount of time, especially when first injected as the piston is still coming up in compression, results in a momentary extra hot flame that can result in damage to the engine.

It is true that diesel fuel contains about 10% more energy per volume of fuel than does gasoline. But the difference between an explosion and a slow burn more than overcomes that small difference.

The EGT indicator on my aircraft says the hottest I can get is 1600 + degrees, running 100LL at wide open throttle, The Pyrometer on my diesel boat says it runs at 2300 degrees wide open.

what you are suggesting is the the gas in this mix will detonate prior to the diesel burning. With a mix this diesel rich I do not believe your theory, simply because this mixture 85to9 gallons simply will not lower the centane numbers any significant amount.

Hey- I don't suppose you'd like to lay out about 5 or 10 key points that would address this issue.

In some ways- it's not valid to compare a lightweight gas, air-cooled airplane engine to a big, heavy, water-cooled diesel...With differences in compression and mixture and on and on and on...(and I read your qualifications).

I guess the question is what damage would running too much gas cause (I'm thinking it's mostly a fuel pump lubrication issue).

The other subtlety is that the gas fuel will be injected directly into the cylinder and to some extent, burns as it is injected (just like the diesel burns as it's injected)...well, maybe the gas burns "faster"....but in both cases, you have fuel meeting hot, 20% oxygen as it's being injected....

This is not an attack on what you are saying, but a friendly jab to say- come on, you know the answer....how about enlightening us :-)

(Yeah, "call the mfg" is the correct answer- but I think you have some other stuff to tell us besides "that amount of gas won't have any significant effect".

Rancher Will wrote:
Over the years I have been told by others about this same problem. Every one told me that running any gas in the diesel has damaged injectors.

I remember a number of years ago when the Environmentalists (EPA) required refineries to stop putting Power Service type additives in winter blend No 2 diesel. That is when all of us had to start buying Power Service Additive (there are also now other brands) to add to diesel in the winter. In the first year a few of our neighbors decided to just add a little gas to their diesel tanks on the trucks and tractors to save the cost of Power Service Additive. It was easy since every ranch has both diesel and gas bulk tanks on hand.

All of them who did this soon had diesel injector repairs required. I also remember that our ranch fuel bulk supplier provided Power Service on the Tank Wagon when delivering Diesel fuel, starting in the Fall and through Spring, that first year to make sure we had a supply to buy when the refineries were forced to stop adding anti-gel aditives.

I buy a 35 gallon drum of Power Service for each of my two ranches every fall to this date, to use in our tractors and trucks. We also carry a gallon of Power service in our over the road Semis every winter for addition when fueling at truck stops. We never allow gas to contaminate Diesel.

Thanks for that info, Rancher Will. Given all your experience with diesels and additives, I'd like to ask a question, if I may. Perhaps some other truck owners on this forum will also find your answer helpful.

A few months ago, I bought a 2004.5 Ram 5.9L Cummins truck, now with 141K on the clock. I only put about 5-8K miles per year on it, about half of that towing. I have started playing with some additives, Lucas UCL, RedLine, and Marvel Mystery Oil. You seem to swear by Power Service, so would you recommend use of Power Service Diesel Kleen at every fill up? Any other additives that you also like? If so, how many ounces per gallon of diesel fuel?

Thanks!

Over the years I have been told by others about this same problem. Every one told me that running any gas in the diesel has damaged injectors.

I remember a number of years ago when the Environmentalists (EPA) required refineries to stop putting Power Service type additives in winter blend No 2 diesel. That is when all of us had to start buying Power Service Additive (there are also now other brands) to add to diesel in the winter. In the first year a few of our neighbors decided to just add a little gas to their diesel tanks on the trucks and tractors to save the cost of Power Service Additive. It was easy since every ranch has both diesel and gas bulk tanks on hand.

All of them who did this soon had diesel injector repairs required. I also remember that our ranch fuel bulk supplier provided Power Service on the Tank Wagon when delivering Diesel fuel, starting in the Fall and through Spring, that first year to make sure we had a supply to buy when the refineries were forced to stop adding anti-gel aditives.

I buy a 35 gallon drum of Power Service for each of my two ranches every fall to this date, to use in our tractors and trucks. We also carry a gallon of Power service in our over the road Semis every winter for addition when fueling at truck stops. We never allow gas to contaminate Diesel.

IMHO I would drain it just to be safe, $300.00 to $400.00 of fuel wasted is a lot less than any damage that may or may not happen. Heck of a gamble, but I would err on the safe side. :)

I accidently put 5 gallons of 87 octane into about 14 gallons of diesel in my 2005 5.9 Ram. Added two quarts of 30wt oil and finished filling with diesel. Was a little hard to start at first, but ran like the proverbial "scalded dog". No adverse effects until I traded it at 85K miles for a 6.7. Still running as far as I know.