Since my last fillup and oil change I've been getting exceptionally bad mileage, and I feel like power is down at low revs too. As in, ~60MPG city trying my very best where I should be getting 75-85. Coasting seems unchanged which rules out things like sticky calipers, and the air filter is still clean. It might be because I dumped some Techron in with the last fillup, maybe a bad batch of gas, or perhaps because it's constantly raining and the air is so thick you practically drown in it, but I decided to get a set of spark plugs and a PCV valve before my big trip. Looking through the maintenance logs, I can't see any records of them ever having been replaced.
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