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Thread: Oil change to different viscosity, any problem?

  1. #1
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    Default Oil change to different viscosity, any problem?

    02 1.8 Vectra C, has been run on whatever oil they fill them up with from new, Vaux 5-30 presumably?...then changed with 0-40 at 1st service, then again with 0-40 at next service...has just had a service and thay have filled it with 10-40 semi-synthetic...will this do any harm at all?

    The car is no longer under any warranty so it wont invalidate anything.

    Also, appologies if this has been asked in the past.

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    On a Sabbatical VauxVeteran's Avatar
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    Not 100% sure, but i think you will find the 5 - 30 is so they can stretch the service intervals out, I've always used 10-40 Vx semi oil without any problems. HTH.

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    Quote Originally Posted by VauxVeteran
    Not 100% sure, but i think you will find the 5 - 30 is so they can stretch the service intervals out, I've always used 10-40 Vx semi oil without any problems. HTH.
    Yeah, something to do with the Eco-Service-Flex, which was predominantly aimed at fleet operators IIRC...we questioned why Vauxhall dealer had used Mobil 1 0-40 instead of the recommended vauxhall 5-30, to which they told us , "well, its better quality, better for the engihne etc etc waffle waffle drivel drivel"...hmm, yeah and more expensive, rip of barstewards!

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    Regular Member armoured farmer's Avatar
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    give oilman a pm ,he can sort you out, no probs............micky.

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    LOL. Yeah with some really expensive oil...

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    running that 1800 on 10w40 semi synth will be perfectly alright if you want to change the service regime..

    Start changing the oil every 6-10,000 miles and it'll last forever..Don't expect semi to be able to go 20,000 without a change..

    the reason VX fill it with semi is that they don't even pay 90p a litre to put it in your sump..more margin out of the service price for them..

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