what happens if you run gas in a diesel?

Not planning on doing it but was just wondering today what would happen if you put in petrol in a diesel engine?

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it would run like poo. diesel fuel has a much higher BTU then gas. [img]/forums/images/smiles/icon_wink.gif[/img]
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what happens if you put in diesel instead of gas?

if i put diesel instead of gas then it runs quite nicely and gets me to work everyday....

but was wondering what would happen if i put gas in...
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really, so you're saying you can run diesel fuel in a car designed for gasoline? It makes sense, but there's gotta be a reason not to otherwise everyone would do it.

Diesel in gas, 100% diesel will run S&$t if at all. The flash point, IE the degrees that the vapors will ignite is 165+ for diesel and -75 for gas. Diesel will smoke badly and fowl the plugs. However I knew a Highway Patrol that back in 72 he'd put 1 gal of diesel fuel to every tank fillup on his 71 429PI (429CJ) and it ran great. The diesel fuel lubed the valve stems better. Gas in a diesel will destroy it due to the combustion pressures being so different by the way the fuel burns. And that's only if it ignited. Gas requires a spark plug. Diesel is a control explosion when the fine mist of fuel is sprayed into the high pressure chamber.

so with regards to high compression gasoline engines, adding a little diesel can actually act as an octane boost? I can't see any other reason why adding diesel would benefit.

It doesn't boost octane, it lubes the valve stems due to the sulfur in it.

You have to remember that diesel went to a low sulfur composition a few years ago, and ultra low sulfur is just around the corner, so nowadays I don't think it would help as much. Here's an interesting link about running diesel in a gas engine, but I think it answers the original qestion nicely:
http://www.straightdope.com/mailbag/mdieselvsgas.html

<font size=-1>[ This Message was edited by: stangboy on 4/29/06 10:21pm ]</font>

In answer to the original question; in a modern diesel engine you will need.
1) New injectors.
2) New fuel pump.
3) A full system flush.
4) Possibly some other new bits as well!

Diesel petrol does not have the lubrication that diesel does hence the injectors and fuel pump will be pretty much junk if the engie has fired up on petrol.

You wouldnt like to know the number of warranty claims rejected because of miss fueling, customers think we wont find out!
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