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Thread: Oil question

  1. #1
    Regular Member Mattle40's Avatar
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    Default Oil question

    Just did a vehicle check on castrols website
    And it recommends for my 1.8vvt
    5w 30 magnatec or 5w 40 edge???
    Can anyone shed some light on why the viscosity should change?

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    The Manual:

    5W/30 for petrol and 5W/40 for diesel.

    Oil must meet or exceed standard GM-LL-A-025 (petrol) or GM-LL-B-025 (diesel).

    Oil make & model appears to be religion, but do a little homework and select one that fits your preferences and belief

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    Vehicle : Vauxhall Astra-J

    Trim : Elite

    Engine : 2.0 CDTi

    Year : 2013

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    Quote Originally Posted by SpiD View Post
    5W/30 for petrol and 5W/40 for diesel.
    Vauxhall recommend 5w/30 fully synth for all Vectra-C and Signum engines, regardless whether they're petrol or Diesel.

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    Quote Originally Posted by Big Dave View Post
    Vauxhall recommend 5w/30 fully synth for all Vectra-C and Signum engines, regardless whether they're petrol or Diesel.
    Hmm. Perhaps depend on actual owners manual version, but the difference between the two is marginal.

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