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  1. Switching from Regular to Premium Gas - Issue?

    9-5 Workshop
    Hello, I recently purchased my 2002 Saab 9-5. I've had to put some money in to fixing it up, but it seems to run like a champ. I had a quick question for anyone who has any ideas: The previous owner used regular gas in it and when I purchased it I switched immediately to premium. Is there...
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