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Put unleaded in a diesel car - 2008 BMW 1 Series

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As long as you didnt put in more than 30% of the tank capacity,just fill to the top with diesel.then fill again when 1/2 empty.
you will have a hot start problem so try to let the engine cool before restarting and do not use it for stop/start trips until empty.also DO NOT use full throttle or climb steep hills in too high a gear.
just to clarify.....the us/canadian army use gas in the diesel tanks in arctic conditions to stop the fuel from freezing......there engines cost 1/2 $million ......

Posted on Aug 22, 2010

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Posted on Jan 02, 2017

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What do I do about diesel fuel in an unleaded tank and engine

Drain as much as possible diesel out of the tank and fill up the tank with unleaded petrol. Initially the engine will be difficult to start and maybe run a bit rough but will improve quickly. Diesel will not damage the engine but will have a affect on the first start and running of the engine until all the diesel is washed out of the engine.

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I put diesel in our unleaded VW Eos . We have drained the tank , put a new fuel filter on and put new unleaded fuel back in , now it will not fire . Any ideas ??

You need to bleed your fuel line. Diesel leaves a thin coat of oil and this needs to be removed via bleeding the line in order to get a high enough octane level that will be combustible and burn off any other residue that could be left with inside the cylinder itself.

Pull your plugs and soak them in 70% or higher isopropyl rubbing alcohol to remove the oil that has covered the plugs themselves.

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I have a feeling you got a wholed of unleaded fuel or bad fuel
I drive a diesel box truck the station I always took it to the fuelman put unleaded in the diesal tanks and the truck just died it had to have the gas tank completed drained and cleaned out but also ask yourself how many miles are on it and when was last tune up and if you live in a cold climate I recommend a heater block plug

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