Improve drop in fuel economy in older Vehicles

If your vehicle's miles per gallon has dropped and feels a bit sluggish and doesn't free wheel in neutral like it use to and your vehicle is over 8 years old it may be because the brakes are not releasing properly and dragging on the Disc/rotor, this is due to the rubber seals in the calipers going hard, in normal operation when you apply the brakes and the piston is forced out and the seal leans out, when the brakes are released and as the seal returns back to normal position it pulls the piston back away from the Disc/rotor, to easily check if your vehicle has this problem, drive the vehicle for several miles then stop and touch each of the centers of all the wheels, if any are hot to the touch jack them up and try spinning the wheel, if it is hard to spin then the brake caliper will need servicing. NOTE: it is recommended to service both front or rear calipers as a pair. Correcting this issue can save you a ton of money on fuel bills and brake pads.