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Mixing Petrol with Diesel to clean diesel engine

  • 27-07-2012 12:54PM
    #1
    gigawatt2007
    Registered Users, Registered Users 2 Posts: 130 ✭✭


    Anyone ever heard of this before, was drinking with a lad last week who suggested that filling up a diesel car and then throwing a fivers worth of petrol in with it - cleans the engine as it guzzles through the mix.

    Sounds a bit bonkers to me.....


Comments

  • #2
    Bpmull
    Closed Accounts Posts: 5,042 ✭✭✭Bpmull


    Heard it before but I wouldn't do it you can buy additives you put in to clean the engine just fill up and put in some of the liquid that's what I would use wouldnt be to keen on the petrol idea.


  • #3
    alias no.9
    Registered Users, Registered Users 2 Posts: 6,381 ✭✭✭alias no.9


    Fine and effective on old school diesels, wouldn't try it on any modern diesels.


  • #4
    MugMugs
    Registered Users, Registered Users 2 Posts: 17,875 ✭✭✭✭MugMugs


    gigawatt2007 wrote: »
    Anyone ever heard of this before, was drinking with a lad last week who suggested that filling up a diesel car and then throwing a fivers worth of petrol in with it - cleans the engine as it guzzles through the mix.

    Sounds a bit bonkers to me.....

    Common Rail Diesel may not appreciate that mix.

    What have you got?


  • #5
    gigawatt2007
    Registered Users, Registered Users 2 Posts: 130 ✭✭gigawatt2007


    2005 1.9 DCI Renault Laguna...


  • #6
    bazz26
    Registered Users, Registered Users 2 Posts: 51,488 ✭✭✭✭bazz26


    That's a common rail unit.


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  • #7
    gigawatt2007
    Registered Users, Registered Users 2 Posts: 130 ✭✭gigawatt2007


    bazz26 wrote: »
    That's a common rail unit.

    Sorry now for being stupid lads but what's a common rail unit!?:confused:


  • #8
    josephsoap
    Registered Users, Registered Users 2 Posts: 665 ✭✭✭josephsoap


    Would it be ok to put it into a VAG PD engine ?


  • #9
    Pottler
    Closed Accounts Posts: 5,073 ✭✭✭Pottler


    Don't. Just don't. I tried it on a van here, just for the banter like, and now everyone is asking why it's suddenly running like a bag of spanners. I didn't fess up(it's my van anyway) but a little pixie in my head is going "well smartypants, you won't try that again, will ya.":D


  • #10
    -Corkie-
    Closed Accounts Posts: 10,025 ✭✭✭✭-Corkie-


    Pottler wrote: »
    Don't. Just don't. I tried it on a van here, just for the banter like, and now everyone is asking why it's suddenly running like a bag of spanners. I didn't fess up(it's my van anyway) but a little pixie in my head is going "well smartypants, you won't try that again, will ya.":D

    I put it my Avensis for the NCT and it was the same. It was really hard to start for ages..


  • #11
    SeanPuddin
    Closed Accounts Posts: 751 ✭✭✭SeanPuddin


    Older diesel engines it is fine. Maybe not a fivers worth though. Used it many times to pass emissions.

    A good hard drive will do the same thing though.


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  • #12
    Weylin
    Registered Users, Registered Users 2 Posts: 273 ✭✭Weylin


    buy some of this,most motor factors have it, :D
    http://www.dipetane.ie/BuyDipetane.aspx


  • #13
    MugMugs
    Registered Users, Registered Users 2 Posts: 17,875 ✭✭✭✭MugMugs


    gigawatt2007 wrote: »
    Sorry now for being stupid lads but what's a common rail unit!?:confused:

    It's a more high pressure system with direct injection. Petrol and the new kind of injectors don;t really mix well,.


  • #14
    dgt
    Closed Accounts Posts: 12,985 ✭✭✭✭dgt


    gigawatt2007 wrote: »
    Sorry now for being stupid lads but what's a common rail unit!?:confused:

    Electronic fuel injection for diesel. Basically, a very high pressure pump pressurises the diesel so much it is injected into the cylinder as a very fine mist. The term common rail means that the fuel is pressurised in a rail attached to the injectors, as opposed to the mandrel bent fuel lines of old mechanical systems. As it is electric, easily remapped, immobilised etc.

    Open to errors and corrections, I don't do common rail :pac:

    As for petrol in a diesel...
    Indirect FTW
    https://www.youtube.com/watch?v=b5xhPAundL4

    But common rail...
    https://www.youtube.com/watch?v=dWR8xv7C9Oc


  • #15
    peasant
    Registered Users, Registered Users 2 Posts: 17,819 ✭✭✭✭peasant


    Running the high pressure injection pump (common rail or otherwise) of a modern TDi on petrol is like running any car engine without oil ...sooner rather than later things will grind to a shuddering halt.

    Diesel is a lubricant, rub a few drops between your fingers and you get a distinctive oily feeling. Petrol on the other hand is a powerful detergent and quickly removes any traces of oil, grease or fat from your fingers when you do the same thing.
    Modern, high pressure diesel injection systems have incredibly tight tolerances and rely on the oilyness of diesel to keep functioning. Strip them of their oil film with petrol and you're runnig metal on metal, quickly doing damage up to total destruction.


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