Just installed my first vacuum gauge and am so amazed after my test drive, I simply must post a question. If I try to stay above 15 pounds of vacuum while DWL (
), my truck does a better job maintaining speed or even accelerating in 3rd or 4th gear at 3000 to 4000 rpm rather than 5th gear at a lower RPM. Really??? Ten or more continuous seconds of 3rd gear-4000rpm on the highway is getting me better MPG than 2000 rpm of DWL in 5th?
