Was getting slightly better than EPA during early ownership. about 20 MPG on the open road at 70 MPH on cruise. During ownership, removed the mud flap on right side of radiator to allow air intake. Cut the bottom off the filter box and blocked side entry noise restrictor. K + N filter. Sounds throaty on full throttle. Used machinist deburr to remove the edge at throttle box inlet. Also hold open the throttle plate - deburr the upper, inner edge of the throttle plate which is a punch out and is absolutely horrible. Cleaning up air intake plumbing and using FlashPaq 91 performance code for advance curve got me to the point that the tires actually squeal on the green light blast-off. Not bad for a minivan motor. There is a watch-out tho, if you use cheap gas it will knock at full throttle before transmission down shift with the 91 code. The 93 advance code demands premium. Tried it with regular winter blend. Knocked so bad I worried about valve damage. Backed out of it quick.