Using diesel as gasoline additive?

[dddon]

the vehicle is a mopar minivan ,,3 liter engine.. 110,000 miles on it ... been using the stuff that is sold at filling stations , over the road trucks use it, i have driven 20,000 miles using it so far and have seen no ill effects til i put in about 20 percent.
ran poorly then..... dddon

[GasSavers_RoadWarrior]

E85 and 15% diesel? That makes sense. I was figuring on trying an E85 and kerosene mix sometime.

[StorminMatt]

Originally Posted by Ryland

I also agree that the sulphure in diesel will destroy the catolitic converter, and should not be used.

And if the sulfur doesnt destroy it, the mere fact that you are dumping TONS of unburned hydrocarbons in the cat WILL.

[GasSavers_Pete]

I have done the same 10% diesel mix from the local gas station as well but can report no gains in MPG or performance although there was an increase in smoothness of the engine.

One point is the oxy sensor may fail. It did on mine but it may have failed anyway since it was over 150 , 000 miles old.

Good luck with the trial and let us know how it goes.

Cheers , Pete.

[trautotuning]

Wow somebody really needs to try this. Might be interesting if it does gain 20% in mpg!

@ 20mpg thats an extra 4mpg, @ 40mpg thats an extra 8mpg!

But, keep in mind diesel is more expensive...

[GasSavers_SD26]

Only 20% per gallon. If it netted 20% more MPG on all of your gallons purchased, gas and diesel, it would be a reduction in cost per gallon.

[kamesama980]

really....

I might have to see if there's anything to this one with that kind of gains. they're about the same price here.

[GasSavers_Ryland]

Originally Posted by StorminMatt

And if the sulfur doesnt destroy it, the mere fact that you are dumping TONS of unburned hydrocarbons in the cat WILL.

I figured that your o2 sensor is less forgiving then a catolitic converter, and that is why when I tested veggie oil I drilled a hole and brazed a o2 sensor bung in, then hooked the (used) o2 sensor up to a volt meter and figured if it killed the sensor then it wasn't worth trying in a car, 10% veggie oil, not bio-diesel, burned just fine, and did not harm anything, so I'm not sure where you are going to get this ton of hydrocarbons to dump in to the catolitic converter, but I would like to know so I don't fallow the same test that you did.

[dddon]

i did not jump right up to 10% .. first i put couple quarts in a tankful, then next a gallon in a tank ..etc .. when i got to 20% the mileage gain fell off and the engine ran poorly ... so i fell back to 12% /15% .... it has not effected the odor of the exhaust , which should change if the cat was bad..i wonder if the viscosity of the fuel is changed enough to decrease the total fuel injected... anyone got any better logic as to why i am seeing an increase in mpg??

[GasSavers_SD26]

I don't have any perfect answers dddon.

The specific gravity of diesel is more than that of gasoline. That would make the overall specific gravity heavier in a combination. In a carbureted engine, that would make it run leaner as engine vacuum wouldn't pull in as much fuel. On an injected engine, it's under pressure, so it's a bit different that way.

What the combination does together chemically? Might be the magic, not sure.

Does your gasoline have ethanol in your area?