Hello All,

I have 198,657 miles on it and it had an engine rebuild 8,100 miles ago because it dropped a valve and had warped heads. I have always had this issue with it and it says I average 12.4-12.8 MPG. I even calculated it and I am still getting roughly mid 12’s to 13’s. I have a pretty light foot too but she just drinks the gas like it’s water. When I first bought the car, it came with an aftermarket air intake. It is one of those dual twin short ram air intakes that sit over the engine. I feel like it just sucks in hot air maybe that is bad for gas mileage? I use the sprint drive obd monitor and it says the air intake temperature ranges from 140-180 degrees depending on the temperature outside (especially in the summer when it’s 100+). Should I get a cold air intake and relocate it to its original spot towards the front of the car for cooler air? Or is there anything else that might be causing issues?

The car is also stock it is not lifted or anything. I also have bad motor mounts I am going to replace in a week or two as the vibration is pretty terrible and the rubber is pretty much gone on those mounts.

Someone told me it should be running premium gas but since it is the non-HO version I thought I didn’t need to?

Have any fault codes shown? Might have a bad sensor somewhere that is resulting in a fixed air/fuel map or something like that. I'm not super versed in that kind of stuff, just throwing out an idea. My 4.7 gets about 16-18 mpg on the hwy 13-14 in town with a 4in lift and a larger diameter MT tire. So if you are stock, you should definitely be getting better.

I usually average 15-16 mpg in the city on regular gas. I experienced lower mpg when my brake calipers seized up.

Ya, I was thinking checking for e-brakes not releasing, or brakes dragging. Air cleaner, tire pressure, etc. There is a lot more than just engine related things that can cause mpg issues.

Quite a few people have commented on increased mpg after replacing the fuel filter. The fuel filter also contains the fuel pressure regulator. I noticed a few mpg increase after replacing mine.

If you are getting 12-13 "combined" MPG. You didnt say combined.. Then your right in the ballpark.

If you are getting 12-13 "combined" MPG and you didnt say combined. Then you are right in the ballpark.

My non-HO 4.7 gets 13-14 mpg around town. On a recent hiway trip it got 18.5 MPG at an average speed of 75-80 MPH over 250 miles. Note that I don't pay any attention to the EVIC MPG reading. It's thrown off by my taller-than-stock tires. I use trip-odometer miles, multiplied by the GPS-confirmed speedo/odo error, and the amount of fuel that was pumped into the tank.