Petrol in a diesel car

  • Thread starter Thread starter Anghammarad
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So fuel may or may not even contain octanes or iso-octanes. Guess I gotta tell that to Leroy Wade when he pays our chem class a visit.
 
Omnis
So fuel may or may not even contain octanes or iso-octanes. Guess I gotta tell that to Leroy Wade when he pays our chem class a visit.
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Yep. Octane rating is just "resists knock with the equivalence of n % iso-octane in octane/heptane mix".

It's likely there'll be some octanes in any given batch of gasoline/petrol - it's just a mix of hydrocarbons - but as for there being a given amount... nope.
 
Stevisiov
I think its most commonly done when someone spends most their life with say a petrol car, it becomes habitual to go to the petrol pump. Then when they get a new car/drive a friends car/drives a hire car, which runs on the other fuel type, people still go to the same pump they have been using all their life by mistake.
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My old high school shop teachers wife did that. They had just bought a new car and it was a Diesel car and the first time she filled it up she didn't pay attention and filled it with Gasoline. This was back when they first started pushing Diesel cars because they not only got better mileage with them at the time but back then Diesel was cheaper than gasoline.This was also before they started using different size fuel nozzles on the pumps and you could still buy leaded fuel.

As for my teachers car it did start and run since she put leaded fuel in it but when she got home he said they found out that when she turned off the switch the car keep running and wouldn't shut off. They had to let the thing sit there and run till it run out of fuel.
 
Kuyong_Chuin
As for my teachers car it did start and run since she put leaded fuel in it but when she got home he said they found out that when she turned off the switch the car keep running and wouldn't shut off. They had to let the thing sit there and run till it run out of fuel.
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Amusingly known as dieselling. And letting it run out of fuel is intensely stupid. Stalling the engine by putting it into a high gear and dumping the clutch is what should have happened.
 
Famine
Amusingly known as dieselling. And letting it run out of fuel is intensely stupid. Stalling the engine by putting it into a high gear and dumping the clutch is what should have happened.
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Might could have did that if it had a manual transmission but it had a automatic in it. Not sure if you could even stall it out with the old style two speed powerglide the one with the front oil pump. Since with that you you could actually push start a car with that automatic tranny.
 
Kuyong_Chuin
Might could have did that if it had a manual transmission but it had a automatic in it. Not sure if you could even stall it out with the old style two speed powerglide the one with the front oil pump. Since with that you you could actually push start a car with that automatic tranny.
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Then perhaps called a competent mechanic who could have choked the air intake for her. Leaving it running was a really stupid idea.
 
or yanked the oil filler cap. I had that happen when I topped the oil up, and forgot to put the cap back.
 
Omnis
Why not just remove the spark plugs? :dopey:
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Diesel vehicles do not have spark plugs. They have glow plugs. Diesel engines use high compression and heat to be able to burn the fuel. That is why it kept running after the switch was turned of the glow plugs stayed hot because the gas is more volatile than diesel fuel so it kept the glow plug hot enough to keep running. If it had been a Semi the older type you could just pull the handle of the manual fuel cut off. I didn't say they was the most mechanically inclined pair. Though he was a good wood and metal shop teacher.
 
Kuyong_Chuin
Diesel vehicles do not have spark plugs. /play along fail.
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Blank-Facepalm.gif
 
Omnis
Blank-Facepalm.gif
Kuyong_Chuin
Diesel vehicles do not have spark plugs. /play along fail.
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Sorry you have to forgive me I was not only very tired from being up all night. Plus my meds were kicking in and we had to put my horse down the day before so I wasn't in a very play full mood at the time. :( Again Sorry.
 
Did she fill your horse with gasoline too?
 
ExigeEvan
His horse died, at what point was it a good idea to ask, or joke, how?
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Thank you and if he had just died it would have been easier on me than me having to be the one to have to put him down. He should have though how hard it as been for me to have to shoot your own horse in the head. :( :sick:
 
Kuyong_Chuin
Diesel vehicles do not have spark plugs. They have glow plugs. Diesel engines use high compression and heat to be able to burn the fuel. That is why it kept running after the switch was turned of the glow plugs stayed hot because the gas is more volatile than diesel fuel so it kept the glow plug hot enough to keep running. If it had been a Semi the older type you could just pull the handle of the manual fuel cut off. I didn't say they was the most mechanically inclined pair. Though he was a good wood and metal shop teacher.
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First off, sorry to hear about your horse.

A few things I disagree with in your post.

1. Glow plugs only operate to help start the engine when cold, after that they do nothing and infact some direct injection diesel engines dont even have them.

2. I dont understand why the engine kept running in the first place when the ignition was turned off. If it was an old style mechanicaly timed injection pump the solonoid at the pump would have closed blocking the fuel feed.If it was a modern common rail the electrical feed to the injectors would have stopped.

The only time I have seen a diesel running on is when it is running on its own engine oil, usually because the engine is overfilled.
 
ExigeEvan
His horse died, at what point was it a good idea to ask, or joke, how?
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When did it become appropriate to depress everyone else with your dead horse? This isn't a mourning thread.
 
OK I think this thread is done. I'm done, anyway. Also, sorry about your horse, Kuyong. Of course, that is terrible news and sad to hear.
 
Scaff
This 👍
Now had it been diesel in a petrol, that would be a totally different matter, that can end up being new engine time if you try and start it
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Pre-Ignition FTL, well either that or just won't run since the compression in a petrol engine may not be high enough
 
Omnis
OK I think this thread is done.
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I think it is too. I've driven 1750 km and diluted the petrol several times and if my calculations are correct I am now down to less than 0.85 liters of petrol in a 70 liter tank. I've driven very carefully but have not once noticed anything out of the ordinary with the engine. So it seems I am in the clear. I just hope there is no long term damage that is yet to show up.
 

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