Ive had the EGR vents installed almost since the truck was new. Just recently now the drivers side when the window goes up the sensor in the door sends it back down. I have to shut the truck off to send the window up n stay up.
In the burbs around here where there are stop signs everywhere way to many n stop lights again way to many , so much stop n go driving my mpg is around 11 or 12.
down in TN where I also have a house with open road driving still some stopping here n there the mpg is around 18 to 20 mpg , plus you can buy real gas.
On the highway doing 60 to 65 the mileage can be 23