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Thread: Anyone tried 5w40 oil in 1.8 engine?

  
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    p-a's Avatar
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    Anyone tried 5w40 oil in 1.8 engine?

    I've been using 10w/40 semi-synth oil in the 1999 Astra 1.8 petrol. Just wondering if anyone is using 5w/40 fully-synth in the same engine? I can get the full synth stuff quite cheap so tempted to give it a go...
    1999 Astra CDX 1.8 16v Auto Estate

    14th December 2012 - 200,000 miles

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    I used castrol edge 0w-40 once! this was absolutely fine, no problems at all

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    vaux fully synthetic is 5w 30 and is good on low milage 1.8 16v engines,but it is really designed for later engines and high mileage and older style engines can be slightly rattly and drink it
    "WHATS THE RETAIL ON ONE OF THOSE?" "MORE THAN YOU CAN AFFORD PAL . . . .888

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    i always run on silkolene pro- sport 5w/40 ester oil and it is currently in my Z18XE coupe

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