Ive heard of some engine and exhaust modifications that will decrease your mpg like for example, i read on the forums that a straight pipe axle back or muffler delete will decrease mpg due to lack of back pressure, but what are the engine mods that will increase mpg?
i thought that tpms light will go off if the tire pressure is too far from recommended psi whether its too much air or too little. i drive in a lot of traffic and ive been getting 34 mpg average with a high of 36. is that normal
Basically engine loads and intake temps effect mpg. Gasoline types too effect mpg due to density and BTUs. More air in requires more fuel and needs a bigger exhaust but having a oversize exhaust pipe will hurt mpg and power. Back pressure is needed for the EGR system to work efficient but the EGR also reduces power due to leaner mixtures.
I've got a K&N Typhoon and also a P2R downpipe (no aftermarket exhaust yet, but soon) and I've seen a pretty major change to be honest. The K&N gave me an extra couple of MPG's and pushed me up to 40MPG at average crusing speeds (Averaged 43.5 MPG on a run to Penn from NYC)
The P2R turned it into a monster, now during a normal run the MPG meter hovers between 45 and 55 mpg under highway conditions, car runs better and under heavy acceleration there is at least 1 more block of MPG present at all times (had 2 blocks in the bar when I had the Typhoon and the stock pipe, now it's between 3 and 4 blocks with the P2R).
Click on the Capt'n Jack's Place signature link for a video. WARNING .. Rated PG-NSFW..
CVT Fully Loaded EX//NAVI//Eibach Pro Springs//H&R 20mm Rear Spacers//Honda 17" OEM//
P2R Down Pipe//K&N Typhoon SRI//32 Diamond Quartz Tint//Clazzio Black-Red Insert & Stitching//
iJDMToy interal&External LEDs//T1R Side Mirrors//Remus USDM Catback Center Exhaust//