i ave between 47 mpg doing 85-90 mph motorway driving and get aroud 500 miles per tank? that any good?
got new leon with 5k miles on it now.
looking to try millers to see if thats any good.
also do these green cotton filters make a difference at all?
got new leon with 5k miles on it now.
looking to try millers to see if thats any good.
also do these green cotton filters make a difference at all?

