Putting Diesel in a Gas Engine - Page 2 - PeachParts Mercedes-Benz Forum

Fulcrum525 · #16 01-08-2011, 02:03 PM

Quote:

Originally Posted by Beastie

Sad but true. As my Father's years advanced and with the onset of dementia and alzheimers ( we were unaware of this at the time) He took his beloved
85300SD to fill the tank at his favorite station he had used for over 20 years
and promptly started pumping gasoline into it. He drove home ( 1.5 miles ) without incidence. After getting home the phone rang and it was the owner of the station who saw Dad finish pumping and tried to stop him before he left the station but dad was gone. Anyway Dad took it to his favorite Indie and they
drained the tank, lines etc. That was about 10-15 years ago and no problems!

That was one very nice station owner! (Certainly it must have been a nice local station where owners and customers shared conversations....) Around here it would be hard for me to believe in something like that happening.

Stretch · #17 01-08-2011, 02:09 PM

I once worked with a bloke who insisted that adding a little diesel to his petrol was the best way of "quietening it down"...

Make of that what you will!

He used to get really pissed off with pump attendants who would give him a hard time as he would almost fill his tank with petrol and then add in an extra litre of diesel on top...

(I don't recommend doing this!)

Beastie · #18 01-08-2011, 02:22 PM

Army, Where in the Netherlands ? I had some very good friends that used to work at their Embassy here in Washington D.C. We all had some great times
hanging out. I also spent time in the Netherlands when I worked in the Airline industry. I remember having my first really fresh Heineken right at the brewery.
Wow !

4x4_Welder · #19 01-08-2011, 02:24 PM

I used to run about 10% diesel in my F250 as it was the only way I could reduce the pinging. It was a 300 inline six quite thoroughly modified with slightly over 10:1 compression. I ran an HEI distributor with about a .06" spark plug gap so it probably would have run on straight Kerosene, but it ran quite well with that mix. I beat on it hard enough that I didn't have to worry about carbon buildup.

bigblockchev · #20 01-08-2011, 02:42 PM

My son got a job clearing a badly overgrown yard in our neighborhood. He naturally took the nearest can with him not wanting to spend his hard earned money on gas. He worked all day on this and after returning home he complained that the lawnmower had gotten progressively harder and harder to start. At the end of the day it required at least 40-50 pulls to start and smoked like hell. I had to flush the tank and run a couple of of gallons through it before it would run at all. It never did run well after that, always smoked. My son has learned that all cans in the garage probably contain diesel or biodiesel so he doesn't steal them to put in his gas Jeep or motorcycle. I wouldn't have believed that you could run a gas lawnmower on 100% diesel. I now have a cordless electric lawnmower (free off Craigslist). Cheers Dan

Stretch · #21 01-08-2011, 02:52 PM

Quote:

Originally Posted by 4x4_Welder

I used to run about 10% diesel in my F250 as it was the only way I could reduce the pinging. It was a 300 inline six quite thoroughly modified with slightly over 10:1 compression. I ran an HEI distributor with about a .06" spark plug gap so it probably would have run on straight Kerosene, but it ran quite well with that mix. I beat on it hard enough that I didn't have to worry about carbon buildup.

Hi 4x4_Welder - I thought it was all nonsense when I first heard about this from my former colleague - his car was a wreck anyway so I couldn't tell the difference.

By adding the diesel are you just reducing the octane level of the petrol? Is that the trick?

4x4_Welder · #22 01-08-2011, 05:34 PM

It increases the flash point of the fuel, making it less susceptible to being ignited by hot spots in the combustion chamber. It's a similar effect to increasing the octane. Most stock distributor type ignitions can't light this mix off reliably, but distributorless, coil on plug and aftermarket multi spark/HEI systems can ignite it, especially with a larger plug gap to catch more fuel.

babymog · #23 01-08-2011, 06:08 PM

Kerosene has less BTUs, less energy than diesel fuel. Mercedes through the early '90s anyway, would allow up to 50% kerosene in #2 diesel for a winter mix. Less power and less fuel mileage, but it will run.

Quote:

Originally Posted by 47dodge

Kerosene is no 1 fuel oil, diesel is no 2 fuel oil. Jet fuel is basically modified kerosene. All will work in a diesel but kerosene, and jet fuel do not lubricate the IP as well, and should not be used for that reason, however one tank should not do any harm.

Stretch · #24 01-09-2011, 03:16 AM

Typical I got it the wrong way round - higher octane stops pinking or course - doh.

I found this information regarding the mixture of diesel and petrol that might be interesting:-

http://www.turbodieselregister.com/mixing_gasoline_and_diesel.htm

http://alternativefuels.about.com/od/researchdevelopment/a/cetane.htm

Also talks about the cetane value being inversely proportional to octane so if you add diesel to petrol to quieten the engine use a lower cetane numbered diesel.