My V6 Sonata is used primarily for city driving. I have been told that this driving pattern can somtimes result in a deposit build-up internally on the engine.
Recently my car overheated because of the failure of the water pump. The water pump was replaced and now the car runs as good as ever and the bonus is that my MPG creeped up just a bit. Can this be the result of deposit build-ups burning off when it overheated?
I check my MPG closely by setting the trip meter to zero when I fill up and then on the next fill-up I divide the miles driven by the gallons needed to refill. I do this check frequently.
Remembering when with carbureted cars I sometimes sprayed a bit of water into the intake to clean out deposits.
Old_Timer