Has anyone else had a drastic MPG drop after a 15k service? I was averaging 24/25 mpg and I am now getting less than 12 mpg. the service said it was because of weather changes... seems like bs to me!
- posted
19 years ago
2004 WRX MPG drops
Loading thread data ...
- Vote on answer
- posted
19 years ago
I've seen noticable changes with seasonal change, but I think it's more because of the gasoline formula changing and the computer relearning it.
Try a tankful of Chevron premium and see what happens. If it still stays at
12, you've got a problem.- Vote on answer
- posted
19 years ago
I know "summer" and "winter" gasolines are formulated differently, but a
50% reduction in fuel economy? It's either leaking somewhere or you are pushing it through the engine. Check the spark plugs, looking for lots of black fluffy deposits.