pdonket

Couldn't hurt to replace your fuel filter if you haven't recently, also you could think about new plugs as well. Neither of these is likely your miracle, but both should help and not hurt.

Joenpb

If the fuel in Indiana didn't contain ethanol, and the fuel in Maryland does, that would explain the decrease in mpg. I don't know if winter blend decreases mpg 20-25%.

ski

Hmmm, where did I read this before in this thread???

aenima4six2

You may want to pickup a cheep bluetooth OBD2 reader on ebay for like $15. With it, you can monitor several engine parameters and gain more insight into this. I would start by looking at your fuel trims at cruise speeds.

LordRipberger

Ya, I am a major city guy either. As stated above I grew up in the corn fields of Indiana. But my job took me here. We will se how life goes, but I basically live in the middle between DC and Baltimore. haha

The engine is up to temp about half way through the trip. But I understand the point of not warming up. But would the car really used 4-6 miles per gallon worth of gas because of this?

LordRipberger

How would this work, what am I looking for in the results, and where would I install it?

LordRipberger

Some are saying that they are getting 28 or so on the highway. I know I won't get near that but since I have never had that, I suppose I could have had a "issue" since the beginning and did not know it. How much does check up and new O2 censors cost?

aenima4six2

The unit plugs into your OBD2 port under the steering wheel. They are super cheap, like only $5. You can use it for many types of diagnostics, including the the MPG analysis. You link the unit to your smart phone (android or iOS) and install an OBD2 analysis tool like Torque. Once you are hooked up, you can monitor engine parameters like long term and short term fuel trims. Both of these parameters should be within +/- 10%. This is basically a % deviation of fuel being added or removed across a specific RPM range. If you see your LTFT are heavy positive, the vehicle is throwing more fuel into the engine. You can also check for any trouble codes, as well as monitor real time fuel consumption.