I've noticed recently that I'm getting 13 MPG whereas I was getting 16-18MPG last month. My tire pressure is 37lbs all around. I don't feel a loss of power, knocking, or sputtering. It's a 2008 with 165K highway miles 1 owner.
Is it Tune up time? I know the oil is due in about 500 miles. I just don't know why all of a sudden it starts sucking the fuel. Air Conditioning?
Confused...
My truck is an 11 ext and I drive it back and forth to New Orleans every month. It's a 2500 mile round trip and if I try to to make two trips on the oil my mileage goes way down. From 22 down to 17. I would bet your Low on oil. It's 25 bucks. Change it.
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Spark plugs don't last forever either. Another cheap 20 minute job.
Hopefully you are using full synthetic oil too......makes a HUGE difference in gas mileage....plus keeping it changed....just a thought, as you didn't mention your oil and oil change status.
I'm taking it in this week, I will report back. Thank you for the suggestions... Maybe I am running low on oil. The screen says I have 43% Oil Life remaining, but you can't count on that )
13 MPG is what you should be getting in the city. It's what I get all the time, actually more like 12. Your driving habits could easily change from month to month.
I bought my 2011 with 90k miles 3 weeks ago and I reset the average economy the day after I bought it. After 2 weeks of driving I was at 12.8. I did OEM plugs and wires and did a AFE replacement high flow air filter and have now been driving for a week. It has stabilized at 13.9mpg. I don't think I will ever get better than this for in town driving.
Everyone of my Escalade's was about the same 12.2-12.4 in the city, 18 on the way up the mountains, and 22 on the way home from the mountains, never saw a change unless we were driving thru snow, then WAY less
45k miles of daily driving and right about 13 to 14 mpg. i use synthetic
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