Hello Hackerheinz! You need a simple tuneup for your car. New syntetic oil, fuel, air and oil filter. Use stp injection cleaner too. Buy new rotor caps too. This will solve the high fuel consumtion, at least 15 to 20 percent! If you are not satisfied,
try anoter set of wheels! 225/60/15 will lower fuel consumpiton anoter 15 percent.
Michael, Stockholm

mickey13@spray.se