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New diesels run very badly on gasoline, if you filled up the tank with gasoline you'd know very quickly as the fuels do mix. Your engine would run rough, spew out lots of black smoke and have poor performance and mileage. If it took 100 miles to notice a judder it's very unlikely to be from contaminated fuel.


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Other than damaging or ruining the fuel injection pump due to lack of lubrication from gasoline, the engine will be much harder or impossible to start because gasoline needs even higher compression than diesel to create enough heat to ignite the fuel. Once it is running it will actually run fine until the fuel pump is damaged and it may even have more power ...


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It will either not start or it will reduce the octane of the fuel. Reduced octane can cause knocking (detonation), which is harmful to the engine. If it is knocking or sounds at all different don't drive it, or let off on the throttle and let it rev high enough so that it stops knocking. In some engines with carburetors it will ignite itself without the ...


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If it's a modern tight tolerance VW engine or such you won't get far. The fuel injection system will wear itself out and make metal fragments in the first 30 miles. The older 80s diesels like the Mercedes can go through a tank or more before damage is noticed. It would heavily depend on how much diesel oil is mixed with the gasoline. You can buy lubrication ...


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No, you shouldn't rebuild the engine unless you have a specific reason. 120k miles isn't that much for a modern engine, so there's no reason to spend the effort, time and money to strip it down. Clean the engine so you find and fix any leaks, do a compression check and do any service items that are due or will become due on the trip like timing chains, ...


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