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  1. Dealer put BG MOA (motor oil additive) in my oil without asking me

    Focus RS Maintenance
    So since the materials cost of the oil and filter was pretty close to the price of just getting it done by a dealer, I went with the dealer. On the invoice I see some cryptic thing added called BG MOA. It's an "engine oil supplement" and it's marketed with lines like "In a recent survey...
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