WDoherty
New Member
- Messages
- 888
- Location
- Alpine, TX
My car (sc400) always averages around 22mpg per tank at fill up, mostly highway driving and some city driving. Well, a couple of weeks ago i had to wait almost two hours to cross the border and idled the whole time. As soon as i got across i filled my tank and these last two tanks have averaged 18mpg and one was almost all highway. This is a huge sudden decrease! Did i fry my sparkplugs by idleing so long or something else?