A
Anonymous
Guest
Can you mix diesel and reg gas together? Can you improve combustion by adding diesel fuel to the gas? Can you raise the octane of reg gas by adding diesel to it?
8) you can in small amounts. there was in fact a few service stations in tucson in the early 80's that did just that. they put 4% diesel in their gas mixture. diesel will not raise gasoline octane though as diesel is designed to light off easier under pressure and temprature than gasoline is. diesel is rated by cetane number which indicates its ability to light up quickly. the higher the number the easier it is to ignite. there are a few benefits though to using diesel in gas, one is to help lube the valve seats. the parrafin in diesel is what does the trick here.
A
Anonymous
Guest
I've had some truckers tell me that they put a very small amount of gas in their diesel in the winter to help cold starting. Putting diesel in your gas might be great for mosquito control, but I'm not aware of anything else. Gasoline engine technology has improved by speeding up the combustion cycle. Diesel will burn slower, increase emissions, reduce power and fuel mileage. A gasoline engine that is burning oil is more prone to detonation because the oil burns really late in the combustion cycle. I think the diesel would cause the same effect.
Adding diesel to gasoline definitely lowers the octane rating of the gasoline. I own a 1941 John Deere Model "A" tractor that was designed as an "All Fuel" engine. It was intended to burn low-octane fuels such as kerosene, distillates, stove oil, etc. and is a spark ignition engine. During the 1930's-early '60's the refineries produced a low-octane fuel called "tractor fuel" that was somewhere between kerosene and stove oil in nature and was a viable low-cost option. The development of practical diesel tractors made the all-fuel machines obsolete.
To burn these low octane fuels successfully requires a low compression rating plus a fair amount of pre-heating in the intake tract. My Johnny Popper has a special manifold that was cast in one piece and has the intake passageway surrounded by the exhaust passage. You have to start the engine on gasoline and when it's warmed up you switch over to the main fuel tank. Not bad on a farm tractor that will be started up and run all day, sure would be a bother in an automobile though.
I have obtained fuel several times from friends who owned diesel vehicles and inadvertantly pumped gasoline into their tanks.
I think that running diesel in your gasoline car is a poor idea. I see no benefit and some problems. Unleaded gasoline in a diesel engine is acceptable for cold weather when mixed at no more than 10% gasoline.
Joe
To burn these low octane fuels successfully requires a low compression rating plus a fair amount of pre-heating in the intake tract. My Johnny Popper has a special manifold that was cast in one piece and has the intake passageway surrounded by the exhaust passage. You have to start the engine on gasoline and when it's warmed up you switch over to the main fuel tank. Not bad on a farm tractor that will be started up and run all day, sure would be a bother in an automobile though.
I have obtained fuel several times from friends who owned diesel vehicles and inadvertantly pumped gasoline into their tanks.
I think that running diesel in your gasoline car is a poor idea. I see no benefit and some problems. Unleaded gasoline in a diesel engine is acceptable for cold weather when mixed at no more than 10% gasoline.
Joe
8) i have never had any problems with a gas/diesel fuel mix, but again the mixture was 96%gas and 4% diesel. i never had any plug fouling problems, or any detonation problems either. and when the engine was ultimately torn down, there were no extra deposits anywhere, or any damage to any parts. in fact the valves never looked cleaner.
2nd.gunman
Well-known member
I have run upto about a 20% mix of diesel in my 250 ute without any major or long term problems. I work in a diesel workshop and occasionaly we have vans come that have been filled up with gas instead of diesel so we have to drop the tank and dispose of the contaminated fuel.
I have found that it results in higher fuel consumption, poor running, exhaust smoke and excessive pinging on acceleration. I only put it in my car cause it is a beater and i get it for free, but would never put diesel into a good motor.
I have found that it results in higher fuel consumption, poor running, exhaust smoke and excessive pinging on acceleration. I only put it in my car cause it is a beater and i get it for free, but would never put diesel into a good motor.
simon
Famous Member
Diesel not only works well when added to the motor oil on occasional crankcase flushing; adding a small amount to the fuel sure aids in keeping the combustion chambers clean of deposits.
It has about the same effect like spraying used brake fluid or water into the carb throat while reving the engine in neutral, its just much easier on the engine.
It has about the same effect like spraying used brake fluid or water into the carb throat while reving the engine in neutral, its just much easier on the engine.
my dad used to talk about gas rationing durring ww2 and he told stories about him and his buddies running kerosene in their cars because they all had "a" ration stickers(about 5 gallon a week I think) he said they cut the gas with kero about 15% and the cars ran ok on a gas and kero mixture. he also talked about a friend of his mixing steeper than that but in order to start the car he had to keep a squirt can of gas and shoot it down the carb to get it started.
I worked at a full service gas station in Michigan's Upper Penninsula. This was the mid-80's. There was this guy (think Bob and Doug MacKenzie's half-brother) who would drive in to the station and have me pump one gallon of diesel then top of the tank with regular unleaded. He claimed the diesel "lubricated" the valves of his engine. He had been doing it for years. The car obviously ran, but I have zero knowledge of the true benefits.
Then there was the time that two Yoopers ran out of gas, and the only "fuel" they had in the back bed of the old truck was their chain saw (two stoke) gas.......
tanx,
Mugsy
Then there was the time that two Yoopers ran out of gas, and the only "fuel" they had in the back bed of the old truck was their chain saw (two stoke) gas.......
tanx,
Mugsy
mugsy":2hya6602 said:
Is that supposed to be bad? Chain saw gas in an "old truck" will do no harm whatsoever and may even be slightly beneficial. Done it plenty of times. If I have leftover saw gas come springtime it always goes in one of my vehicles. Now you modern folks with fuel injected engines 'may' have difficulties with the O2 sensors (dunno for sure) but it really isn't a problem in a carbureted vehicle.
Joe
. You could still see the smoke when the truck was half mile away!! 
Well, their saw gas had to have been mixed a LOT richer than 50:1 because I have done it often enough to know it really doesn't smoke much. I have put many, many hundreds of hours on my chain saws in the last 35 years, and I would not tolerate a saw that emits more than "barely visible" smoke, not to mention visible from a half-mile away.
Joe
Joe
Maybe that's what happened 
: Putting Diesel in with Gasoline is generally not recommended. The parafin might help lubrication somewhat but usually it just clogs up the fuel filter.
On the other hand I know that some Off-roaders here in Iceland routinely blend gas into their diesel in winter for better cold performance and power. 10-15% gas mixed with diesel should be safe
On the other hand I know that some Off-roaders here in Iceland routinely blend gas into their diesel in winter for better cold performance and power. 10-15% gas mixed with diesel should be safe
Ive seen somone run straight Diesel in a 460 V8 Engine one time....a Carburated one.....once it burned the diesel fuel through it we put gas in it and she ran as good as always. It ran on Diesel but it didnt have much power and it smoked horrible.
This was only done because the Truck had a blown up 6.9L and we swapped in a 460 from a old E350, it had like 1\4 tank of Diesel and figured screw it worse it will do is screw somethin up. For some odd reason though it seemed like it got really got mileage on the Diesel, like 15mpg with a 460, C6 and 4.10 gears.
My buddy once dumped diesel in his mud truck so he could keep playing, 78 Chevy with a 400 smallblock, this was done because he was muddin and was hammered and all they had was 10 gals of diesel fuel and he couldnt drive to the station to get gas. Once again it smoked bad but it did run halfway decent.
Now if you try running gas in a diesel you'll burn it up.
I used to run 2 stroke boat gas through my 87 Ranger with a EFI 2.9L at the end of the season.....never seemed to hurt anything. Run it in lawn mowers many times.
The fuel you guys are talking about called "tractor fuel" was actually available up untill the mid 90's.....atleast here.....they labeled it "Economy" and had like a octane rating of 84 or something....and they sold it 30 cents cheaper then everything else.
I ran it in a Road going vehicle once.....once again the little 2.9L in my ranger....it ran like total shit but i was broke and it got me the 30 miles home. Siphoned it out and put it in the lawn mower....it ran ok on it but not great.
EFI Vehicles are alot more picky on what you can run in them, a Carbed vehicle will run (maybe not good, but run) on damn near anything that will burn.
This was only done because the Truck had a blown up 6.9L and we swapped in a 460 from a old E350, it had like 1\4 tank of Diesel and figured screw it worse it will do is screw somethin up. For some odd reason though it seemed like it got really got mileage on the Diesel, like 15mpg with a 460, C6 and 4.10 gears.
My buddy once dumped diesel in his mud truck so he could keep playing, 78 Chevy with a 400 smallblock, this was done because he was muddin and was hammered and all they had was 10 gals of diesel fuel and he couldnt drive to the station to get gas. Once again it smoked bad but it did run halfway decent.
Now if you try running gas in a diesel you'll burn it up.
I used to run 2 stroke boat gas through my 87 Ranger with a EFI 2.9L at the end of the season.....never seemed to hurt anything. Run it in lawn mowers many times.
The fuel you guys are talking about called "tractor fuel" was actually available up untill the mid 90's.....atleast here.....they labeled it "Economy" and had like a octane rating of 84 or something....and they sold it 30 cents cheaper then everything else.
I ran it in a Road going vehicle once.....once again the little 2.9L in my ranger....it ran like total shit but i was broke and it got me the 30 miles home. Siphoned it out and put it in the lawn mower....it ran ok on it but not great.
EFI Vehicles are alot more picky on what you can run in them, a Carbed vehicle will run (maybe not good, but run) on damn near anything that will burn.
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