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  1. Engine, Power, and Performance
    My 2007 Subaru has error codes P0016 , P0018 , P0021 , P0028 , P0128 I replaced the oil with 5w-30 which is what the oil cup read I used a high mileage (non synthetic if that matters) and well as a new oil filter. I also replaced the intake valve solenoid on the drivers side. And put some...
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