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Background: * 2014 Prius with 205k * bought the car at 150k (was uber) and did right away the EGR cooler (quite clogged)/pipe/valve, new PCV valve...
2014 with 185k (previous owner uber car). last weekend drove up to Tahoe (5h drive 7k passes) and got only 37mpg going up (instead of 42+), but...
