I have a 2002 F250 5.4L gas 4x4 off road and was wondering if anyone has added a chip and seen an improvement in gas mileage. Also, which chips should I watch out for. I am not looking for more power persay, just better fuel mileage. My mileage varies from 10-14mph empty. The more expressway driving the worse the mileage, because of speed. Thanks for any help.

 

that is about average I have an 04 and I have had a 02 about the same milage