Automechanicfilter: The Case of the Thirsty Tank
November 22, 2009 8:47 PM Subscribe
What could be some reasons why my gas mileage is very suddenly and dramatically craptastic?
posted by desuetude to travel & transportation (19 answers total) 1 user marked this as a favorite
The decrease in fuel efficiency happened directly after I got stuck driving my car on a flooded road through deeper water than it should've been asked to handle. The car didn't stall, but it felt very close to stalling, and the steering was "stiff" for a few minutes. However, the functioning of the car returned quickly to totally normal. Except that my gas mileage is reduced by nearly half.
It's not running particularly rough or loud, using more oil than usual, running hotter than usual, or anything else that would signal an obvious "car is working too hard" issue.
The gas tank has been run down nearly to empty and filled, fuel injector cleaner has been used once. It's been a couple of months, so it's not resolving itself, that's for sure. And no, nothing's leaking when it sits.
It's a 1996 meticulously-maintained Neon. So yes, it's getting up in years, and I know that some cars lose fuel efficiency as they age, but this was a VERY dramatic change.