To my knowledge combustion is just burning fuel and if all you need is fire to burn a fuel shouldn’t any type of fuel work in any type of car?
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Nope. Gasoline is way too volatile and explosive for the high compression of a diesel engine. This can also be an issue if the octane rating of the gasoline is too low.
Diesel is not even flammable and is way too **un**volatile to even ignite in the low compression of a gasoline engine.
Ethanol contains much less energy than either of the above, and you need to inject about 50% more of it or it simply won’t burn. It is also chemically different from gasoline and gasoline, and therefore unless the engine is adapted to it there are lots of components that may dissolve and be ruined. This mainly affects rubber in stuff like O rings and gaskets.
Your argument is that they all burn so all fuels should work in all engines. You’re not entirely wrong. An engine that *could* handle any combination of these fuels could certainly be created. The problem is that it would *suck*. All car engines have unfathomable amounts of engineering and research behind them. A modern car engine is pushed as close to the edge as possible to squeeze out every last bit of efficiency, power and emissions compliance. There simply isn’t room to allow for the margins that would be needed to make it fuel universal.
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