Hi all,
The miles per gallon figure has dropped by 20%.
Ive checked for fuel leaks (none) and replaced the air, fuel and oil filters and changed the oil.
The Car passed its emissions test at its MoT only 2 weeks ago (I've had the problem a month now)
What else would cause a sudden and permanent drop of MPG?
I'm now getting 400 miles per tankful instead of 500 miles per tankful. I can usually get 50 litres in a tankful.
Stephen