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  1. W177 A35
    My 1yr old a35 has just had its first service done at ATS. I paid for premium mobil1 oil. After leaving with my car I realised on the invoice ow30 oil was used not ow20 which is what MB recommends (229.71). Is this still ok for my car? Or should I get back in touch with ATS for a change of oil...
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