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Thread: The importance of correct oil

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    Regular Member Steel's Avatar
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    Default The importance of correct oil

    I know this doesn't apply to our motors but just to show how important the correct oil can be I came across a fault on Volkswagen Pump Deuce engines today that I would never have previously considered.

    Some of you will be aware that this is a unit injector system where the pump provides the initial pressure then the action of a cam on the injector provides a secondary pressure on the fuel as it injects it. If the wrong grade of oil is used the hydraulic action of it can affect the injection, only marginally but in some cases it can produce a fault code due to the effect on the injection pressure/spray pattern.

    Can you imagine the surprise 'I have fault code Pxxxx' reply 'oh yes, you have the wrong oil in!'

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    Regular Member Ste's Avatar
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    Cam operated injectors isn't anything new, in fact it's been around a long time. The cam causes the injector to open by raising the fuel pressure in the injector 'barrel'

    Not heard of it being affected by oil grade to an extent where the OBD throws a code.

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    Regular Member Steel's Avatar
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    Quote Originally Posted by Ste View Post
    Cam operated injectors isn't anything new, in fact it's been around a long time. The cam causes the injector to open by raising the fuel pressure in the injector 'barrel'

    Not heard of it being affected by oil grade to an extent where the OBD throws a code.
    Not a new system at all, unit injectors have been used widely for a long time and I was surprised to say the least that it could cause a fault code, but it can now!

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    On a Sabbatical VauxVeteran's Avatar
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    It's buuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuul****e, I've ran my PDi 130 on both a top up of 10/40 and a full change of 5/30, nothing is failing right now, now come buy some of my Monday to Sunday existance lubricant, I only charge 2000 pounds for 5 litres and anyone quoting VV is a robbin barsteward can have it for the ultra low price of 25 per 5 litres.

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    Regular Member nutron's Avatar
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    Are you on drugs VV? That made no sense at all.

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    Ex Vec-C Admin & Founder Bainie's Avatar
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    I had to top my oil up last week (Pd170) and had to use vw507.00 spec oil fully synthetic, eventually found some after much searching, £14 a litre !!!

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    Regular Member Ste's Avatar
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    Quote Originally Posted by Steel View Post
    Not a new system at all, unit injectors have been used widely for a long time and I was surprised to say the least that it could cause a fault code, but it can now!
    There's an echo round here.

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    On a Sabbatical VauxVeteran's Avatar
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    Quote Originally Posted by nutron View Post
    Are you on drugs VV? That made no sense at all.
    Drunk bud

    Quote Originally Posted by Bainie View Post
    I had to top my oil up last week (Pd170) and had to use vw507.00 spec oil fully synthetic, eventually found some after much searching, £14 a litre !!!
    I think it's a con Tom to get you to buy their oil, I had a chat with Mark a few mths ago about it, and we both agreed it was a convenient thing to do on their part to confuse ppl, it's supposed to be because of the camshaft pressure is so high that *ordinary* oil can get squeezed out, like I say I've had VX 5/30 in it for 8k now and all thats happened is it burned half a litre.

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    Get the PD specific oil out of Halfords, it's dirt cheap - I used to use it in my DTi Astra because it was the cheapest way for getting a fully synthetic oil.

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    Ex Vec-C Admin & Founder Bainie's Avatar
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    Quote Originally Posted by VauxVeteran View Post
    Drunk bud



    I think it's a con Tom to get you to buy their oil, I had a chat with Mark a few mths ago about it, and we both agreed it was a convenient thing to do on their part to confuse ppl, it's supposed to be because of the camshaft pressure is so high that *ordinary* oil can get squeezed out, like I say I've had VX 5/30 in it for 8k now and all thats happened is it burned half a litre.
    yeah, I wondered about it, I saw some fully synthetic 5/30 , but tbh I don`t want to give them any reason to wriggle out of a warranty claim if the need arises. (though I know it would be near impossible to prove what kind of oil is in it). After your words of warning i`ll need all the help I can get if things go tits up !!

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