Horrible Gas Mileage
#151
06-30-2010, 10:11 PM
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#152
07-01-2010, 12:42 AM
Since I bought my car in April 2008 I can count on 1 hand how many times I have gotten less than 19mpg. Anyone getting in the mid teens must be putting kerosene in their cars or something. The only time I get less than 19 is in the middle of winter when I have my car idling to warm up as I clean it off.
I just got 24mpg on my last tank. And contrary to what people think, I have found that my car gets worse mileage on the highway. I get the best mileage on back roads driving where I can leave it in 5th or 6th and use momentum to keep the mileage reasonable. I was getting 28-29mpg on a few 30-40 minute trips recently, according to my ScanGauge II (which is calibrated every time I fill up, and last tank was within .2mpg of actual calculated mileage). On straight highway cruising, the best I got was just under 26mpg.
I just got 24mpg on my last tank. And contrary to what people think, I have found that my car gets worse mileage on the highway. I get the best mileage on back roads driving where I can leave it in 5th or 6th and use momentum to keep the mileage reasonable. I was getting 28-29mpg on a few 30-40 minute trips recently, according to my ScanGauge II (which is calibrated every time I fill up, and last tank was within .2mpg of actual calculated mileage). On straight highway cruising, the best I got was just under 26mpg.
#153
07-01-2010, 02:39 AM
Since I bought my car in April 2008 I can count on 1 hand how many times I have gotten less than 19mpg. Anyone getting in the mid teens must be putting kerosene in their cars or something. The only time I get less than 19 is in the middle of winter when I have my car idling to warm up as I clean it off.
I just got 24mpg on my last tank. And contrary to what people think, I have found that my car gets worse mileage on the highway. I get the best mileage on back roads driving where I can leave it in 5th or 6th and use momentum to keep the mileage reasonable. I was getting 28-29mpg on a few 30-40 minute trips recently, according to my ScanGauge II (which is calibrated every time I fill up, and last tank was within .2mpg of actual calculated mileage). On straight highway cruising, the best I got was just under 26mpg.
I just got 24mpg on my last tank. And contrary to what people think, I have found that my car gets worse mileage on the highway. I get the best mileage on back roads driving where I can leave it in 5th or 6th and use momentum to keep the mileage reasonable. I was getting 28-29mpg on a few 30-40 minute trips recently, according to my ScanGauge II (which is calibrated every time I fill up, and last tank was within .2mpg of actual calculated mileage). On straight highway cruising, the best I got was just under 26mpg.
#156
07-01-2010, 03:22 AM
#157
07-01-2010, 03:28 AM
#159
07-01-2010, 03:46 AM
#160
07-01-2010, 03:47 AM
#162
07-01-2010, 03:58 AM
I used to get over 300 mi/tank, but lately I have only been getting 250 max (approx 15-17 gal each time I fill up) over the last month or so.
Granted I do a ton of quick trips/stop go driving but i have never had this bad of mileage. Did a 90 mi trip today and I could just see the fuel needle drop.
Replaced the air filter, did a seafoam treatment, full tires, ECU reset, just had an oil change. Took it to the dealership 2x to run diagnostics. It is actually running lean. Could not find any issues with the fuel system or tank. What the hell is wrong with my car?
Granted I do a ton of quick trips/stop go driving but i have never had this bad of mileage. Did a 90 mi trip today and I could just see the fuel needle drop.
Replaced the air filter, did a seafoam treatment, full tires, ECU reset, just had an oil change. Took it to the dealership 2x to run diagnostics. It is actually running lean. Could not find any issues with the fuel system or tank. What the hell is wrong with my car?
#164
07-01-2010, 08:13 PM
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ok i also have the same problem i changed my plugs which had like no electrode left so changed them servise my jwt airfilter oiled it up, also ran seafoam thru the car. now im gonna change my oil from 10-30 synthetic qhorsepower oil to 5-30 as recomended from infiniti to royal purpal 5-30 full synthetic and change the fuel filter but in out cars you have to buy the fuel pumpe becuase the fue filter is in it will keep everyone posted
#165
07-01-2010, 09:54 PM
Join Date: Jun 2010
Location: NYC
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I am in the same boat.
I get around 170 to 200 at 1/4th tank left. I usually fill the car up when I am at quarter tank. i did say I do about 60city/40hwy. I bought this car 2004 G35x last year and always gotten around the same amount of mileage always thought there was something wrong with it but I am not sure. Whenever I go on long drives like to Jersey from NY my mileage seems to be pretty great. Haven't measured too accurately though. I am gonna keep a close eye on it for the next few days and see how it goes.
After how many miles are the spark plugs need to be changed usually ? I am at 79k miles.
And this seafoam thing can I just put it in the tank or there is some special way it has to be done ?
After how many miles are the spark plugs need to be changed usually ? I am at 79k miles.
And this seafoam thing can I just put it in the tank or there is some special way it has to be done ?