2000 S70 knocks on premium???

Discussion in 'Volvo S70' started by G. Cook, Aug 12, 2004.

  1. G. Cook

    G. Cook Guest

    My 2000 S70 has about 67K mostly highway miles on it and I just got
    back from the dealer. I noticed it knocking shortly after I got it and
    switched to 89 grade gas but then the colder weather set in and I
    didn't notice whether it continued. This summer it was worse so I
    switched to 93, with no improvement after several tankfuls of mostly
    highway driving. It does it on acceleration between 20-30 mph. They
    didn't know what to do besides put some Techron in and charge $600 for
    the 60K miles service (fluids, plugs, filters, stuff like that.) It's
    my understanding and experience that modern engine management systems
    don't allow knocking to persist. I have run 87 octane in my '93 850
    for 8 years without pinging.
    Anyone with experience with this out there?? It doesn't seem like this
    is normal behavior.
    This engine has the VVT, which they also claimed has solid lifters,
    after I mentioned that I thought they were noisey. Is this true??
    G. Cook, Aug 12, 2004
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