Forum home Road cycling forum The cake stop

Putting unleaded in ones diesel car.

foreheadforehead Posts: 180
edited September 2015 in The cake stop
Don't do it, it's expensive.
I am a prat.
That is all.
Cube - Peloton
Cannondale - CAAD10

Posts

  • bompingtonbompington Posts: 7,674
    Forehead, meet Palm.

    Commiserations. We've all done daft things - I too have done very expensively daft things on occasion.
  • ddraverddraver Posts: 23,193
    Ma raver has done it on many an occasion...
    We're in danger of confusing passion with incompetence
    - @ddraver
  • First time in 16 years of driving I've ever done anything so stupid.

    No new shiny bike stuff for me this month! :(
    Cube - Peloton
    Cannondale - CAAD10
  • VTechVTech Posts: 4,736
    First time in 16 years of driving I've ever done anything so stupid.

    No new shiny bike stuff for me this month! :(


    have you driven it ?
    Living MY dream.
  • nicklousenicklouse Posts: 81,520 Lives Here
    It kinda depends on how much you put in.

    As it will run on petrol once you start it. But ones that bit of diesel that was in the lines and filter is gone it will not restart.

    But if you remember upto about half a tank just swap pumps and go for a long drive.

    Back when we had good winters in the UK we always added a litre of unleaded to a tank of Diesel to stop it freezing (waxing).

    It is good having one of each to keep you on your toes.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • VTechVTech Posts: 4,736
    It kinda depends on how much you put in.

    As it will run on petrol once you start it. But ones that bit of diesel that was in the lines and filter is gone it will not restart.

    But if you remember upto about half a tank just swap pumps and go for a long drive.

    Back when we had good winters in the UK we always added a litre of unleaded to a tank of Diesel to stop it freezing (waxing).

    It is good having one of each to keep you on your toes.


    +1, Ive added £25 into a seat once so around 1/3 tank and filled completely with diesel then drove it and kept topping up at 3/4 tank for a week. Never had an issue with it.
    Living MY dream.
  • Luckily I realised with 20 litres in the tank and didn't drive it. The AA (specialist 'Fuel Assist' vans operate to help daily with fucktards like myself) rocked up 4 hours later and drained it without bother.
    Cube - Peloton
    Cannondale - CAAD10
  • We had one petrol and one diesel car until a few months ago - always made me question myself when at the fuel pump. Now have 2 diesel cars, makes filling up oh so easy !!!
  • We had one petrol and one diesel car until a few months ago - always made me question myself when at the fuel pump. Now have 2 diesel cars, makes filling up oh so easy !!!

    I only have 1 diesel car, still managed to put unleaded in it!

    I'm a censored .
    Cube - Peloton
    Cannondale - CAAD10
  • The damage would come from lack of lubrication in the (very) high pressure fuel pump and injectors.

    Diesel fuel has to meet a minimum Lubricity spec to ensure that these parts are kept well lubed.

    (As an aside, when they started taking the Sulphur out of diesel in big way (2000 to 500 to 350 to 350 to 10ppm over the years), they also removed much of the lubricity as the sulphur acted as a lubricant. Hence engine problems, hence the new Lubricity spec in EN590).

    Euro 95 UL petrol has very poor lubricity and there is no spec for it, so that is mainly where the damage would occur, but you might get away with it if the mix isn't too bad.

    I've always though it wouldn't be too difficult to make a small tab in the filler neck that can detect viscosity or volatility and beep the horn in case it falls outside limits.....Dragon's Den anyone?!
  • 964cup964cup Posts: 1,361
    I've always though it wouldn't be too difficult to make a small tab in the filler neck that can detect viscosity or volatility and beep the horn in case it falls outside limits.....Dragon's Den anyone?!
    You're overthinking it. Diesel nozzles are bigger. Recent Land/Range Rovers come with a spring loaded device triggered by the narrower unleaded nozzle going too far in; shuts off the filler neck. You get a bizarre plastic widget for resetting it. Presume it's a JLR patent, or everyone would have one.
  • morstarmorstar Posts: 4,663

    I've always though it wouldn't be too difficult to make a small tab in the filler neck that can detect viscosity or volatility and beep the horn in case it falls outside limits.....Dragon's Den anyone?!

    Sounds to me like you're suggesting electronics in the fuel tank. :shock:
  • AnonymousAnonymous Posts: 79,678
    I've always though it wouldn't be too difficult to make a small tab in the filler neck that can detect viscosity or volatility and beep the horn in case it falls outside limits.....Dragon's Den anyone?!
    You're overthinking it. Diesel nozzles are bigger. Recent Land/Range Rovers come with a spring loaded device triggered by the narrower unleaded nozzle going too far in; shuts off the filler neck. You get a bizarre plastic widget for resetting it. Presume it's a JLR patent, or everyone would have one.


    This thing has already been on Dragons Den. It's called a Fuel Angel. About £15 and it can be fitted to almost any diesel car.
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