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It is always good to discuss fuels and combustion because engines are changing to meet reduced emission standards and fuel economy, and fuel suppliers are forever altering the mix of substances to also meet these targets but also to meet their profit margins (I suspect to the point of adding stuff they cannot dispose of or use elsewhere, I'll mention more of this point below).
I have a few points to make:
Diesel when mixed with oxygen and is compressed to a certain point will detonate itself (cetane rating) - this principal was how the first engines simply worked.
Two, the term detonation in petrol engines referred to too quick a burn of the mixture creating too quick a rise in pressure hitting the piston before it had sufficient leverage with the conrod on the crankshaft. It can occur after TDC! So the argument about what happens at combustion can be very complex indeed. Lots of things happen.
Thirdly and incidently without having Googled it yet, my understanding about the mandating of smaller fuel nozzles and fuel tank opening was to stop people using any other fuel other than unleaded fuel. This had two reasons so that emission standards are maintained, and that catalytic convertors weren't damaged.
Fourthly, the OP had a problem with "contaminated" fuel. (it was that diesel contaminated the petrol). He was advised that he had to remove the contents of his tank. This raises a few issues. Where does he put this, and is that container readily portable? (presumably 130l equals over 100 Kg). And then what does he do with this fuel (it is OK but a mix of 2 OK fuels)?.
If he returned it to a fuel company in all likelihood it will be returned to some tank diluting it further(the contamination is just fuel isn't it) and then reused as fuel. Environmentally he can't dump it, or it may cost him substantially to legally dispose of it. It would already have caused him some pain because the fuel already was costly. So the most acceptable thing from a cost and environmental point of view is for him to somehow use it as a fuel, but how does he do this? A good point for discussion.
I have a few points to make:
Diesel when mixed with oxygen and is compressed to a certain point will detonate itself (cetane rating) - this principal was how the first engines simply worked.
Two, the term detonation in petrol engines referred to too quick a burn of the mixture creating too quick a rise in pressure hitting the piston before it had sufficient leverage with the conrod on the crankshaft. It can occur after TDC! So the argument about what happens at combustion can be very complex indeed. Lots of things happen.
Thirdly and incidently without having Googled it yet, my understanding about the mandating of smaller fuel nozzles and fuel tank opening was to stop people using any other fuel other than unleaded fuel. This had two reasons so that emission standards are maintained, and that catalytic convertors weren't damaged.
Fourthly, the OP had a problem with "contaminated" fuel. (it was that diesel contaminated the petrol). He was advised that he had to remove the contents of his tank. This raises a few issues. Where does he put this, and is that container readily portable? (presumably 130l equals over 100 Kg). And then what does he do with this fuel (it is OK but a mix of 2 OK fuels)?.
If he returned it to a fuel company in all likelihood it will be returned to some tank diluting it further(the contamination is just fuel isn't it) and then reused as fuel. Environmentally he can't dump it, or it may cost him substantially to legally dispose of it. It would already have caused him some pain because the fuel already was costly. So the most acceptable thing from a cost and environmental point of view is for him to somehow use it as a fuel, but how does he do this? A good point for discussion.
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