Gas Mileage Drop
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Gas Mileage Drop
As of about 3 weeks ago I have noticed a drastic drop in my MPG. Usually I am able to get between 85-95 miles per quarter tank (5 gallons). I am now lucky if I get 70 miles per quarter tank. The only thing that has changed is my tires, I got NEW ones. I did go from some old squared out FireStone Firehawks to General GMAX (215/55/17). I have a K&N Typhoon intake in the car and I plan on cleaning the filter this weeked, it does not look very dirty nor does much dirt come off when touched. I run 93 octane gas and my driving habits have not changed. I just recently hit 60,000 miles and was considering a tune-up but am not sure if that is the issue/if it's worth it.
Any ideas?
Any ideas?
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TheAdrenaline (11-15-2012)
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TheAdrenaline (11-15-2012)
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60K miles is pretty early to start needing to do tune-up items like plugs and such. I'm at 112K on my '06 and just recently changed my spark plugs and it gave me a 1-2MPG increase.
My first thought it winter blend fuel, but i haven't noticed my MPG drop much since the changeover.
You said you have new tires, check to make sure they are properly inflated. With the onset of cold weather, tire pressures tend to drop and running low can make mileage suffer.
Any check engine light on?
Have you calculated out your fuel economy by filling the tank, driving it, then refilling and dividing the gallons added vs miles driven?
Our fuel gauge is not that accurate. It's slow to move inthe top of the scale, and then drops like a rock near the bottom, so it's hard to give an accurate estimate based on 1/4 tanks and such.
My first thought it winter blend fuel, but i haven't noticed my MPG drop much since the changeover.
You said you have new tires, check to make sure they are properly inflated. With the onset of cold weather, tire pressures tend to drop and running low can make mileage suffer.
Any check engine light on?
Have you calculated out your fuel economy by filling the tank, driving it, then refilling and dividing the gallons added vs miles driven?
Our fuel gauge is not that accurate. It's slow to move inthe top of the scale, and then drops like a rock near the bottom, so it's hard to give an accurate estimate based on 1/4 tanks and such.
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TheAdrenaline (11-15-2012)
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TheAdrenaline (11-15-2012)
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I drove ttrank's car solo
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The PCV replacement only takes about 15 minutes and I believe the valve is less than $20 so you might do that when you clean the MAF sensor.
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TheAdrenaline (11-15-2012)
#15
I drove ttrank's car solo
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G35 sedan w/ too much money in mods
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TheAdrenaline (11-15-2012)