My K75 has 120,000 miles on it and I've noticed that my fuel consumption has deteriorated quite dramatically. I used to get 220 miles per tank (50 MPG) but this has dwindled to a miserable 160 miles (35 MPG). I'm aware that the use of ethanol in the gas has an adverse affect on MPG but surely not this much?
I've installed a new air filter and spark plugs but this hasn't made any obvious improvement so would be thrilled at any helpful suggestions. I recall reading somewhere of a faulty sensor that can cause excess fuel to be injected into one of the cylinders but am unable to locate said article.
I average 15,000 miles a year and so any improvement will save me a decent amount of money.