Horrible Gas Mileage
#211
I maintain my car fairly well and average about 19-21 mpg city depending on how much I floor it. Some weeks are better than others. lol Having lightweight wheels helps with my works that weighed 30lbs each I noticed I'd only get about 300 miles per tank, now with my te37's, same size, I get 330-360. Much better.
#212
I also doing a poor mileage, 12 MPG (85% city), i drive like a grand-ma most of the time
2004 G35 AUTO with 64k km, the car was never used during the winter, its is first winter now with me
I cleanup-ed my air filter last night and MAF, tomorow I will fill my tank with a injector cleanup in my tank, hopefully that will improve my mileage.
The way i drive I should get around 19-21 MPG not 12!
I also have a question, the previous owner of my G35 put a z-tube with K&N air filter, is the z-tube can decrease the mileage, I saw in this forum telling its improve?
I ordered a OBD2 Bluetooth device to connect on my car with my phone to see all the sensors and see what is going on, the check engine does not come on but I suspect a sensor have an issue but not enough to light up the check engine? Any tips to check with OBD2? Does errors can occur even if the check engine is not on?
2004 G35 AUTO with 64k km, the car was never used during the winter, its is first winter now with me
I cleanup-ed my air filter last night and MAF, tomorow I will fill my tank with a injector cleanup in my tank, hopefully that will improve my mileage.
The way i drive I should get around 19-21 MPG not 12!
I also have a question, the previous owner of my G35 put a z-tube with K&N air filter, is the z-tube can decrease the mileage, I saw in this forum telling its improve?
I ordered a OBD2 Bluetooth device to connect on my car with my phone to see all the sensors and see what is going on, the check engine does not come on but I suspect a sensor have an issue but not enough to light up the check engine? Any tips to check with OBD2? Does errors can occur even if the check engine is not on?
#213
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?
Last edited by atefitty; 12-04-2013 at 11:36 PM.
#214
After 4 weeks of data here my result:
week 1, 95% city, got the car, I drive normally, I get 13MPG
week 2, 95% city, same thing, 13.7 MPG
week 3, 75% city, K&N filter cleanup, fuel injector cleanup, 14.3 MPG
week 4, 95% city, 13 MPG
Now I have done a ECU reset and hope that will do something, I will check OBD2 sensor this weekend but I have no check light, but maybe some sensor like O2 are defect or my ECU is always running in open loop.
week 1, 95% city, got the car, I drive normally, I get 13MPG
week 2, 95% city, same thing, 13.7 MPG
week 3, 75% city, K&N filter cleanup, fuel injector cleanup, 14.3 MPG
week 4, 95% city, 13 MPG
Now I have done a ECU reset and hope that will do something, I will check OBD2 sensor this weekend but I have no check light, but maybe some sensor like O2 are defect or my ECU is always running in open loop.
#217
#219
G35's are really only fuel efficient on the highway at 75MPH with the cruise control set, downhil with a tailwind after taking a dump.
Other than that, getting mileage in the teens is somewhat normal. My AWD is a heavy bastard, and i manage maybe 15-18MPG city driving only...even when trying to baby it.
Highway i can squeak out 24-26MPG, but only when cruising with the CC set. Minute i get off the highway, it drops like a rock.
I've run 89-93 octane with no difference in fuel economy really.
Other than that, getting mileage in the teens is somewhat normal. My AWD is a heavy bastard, and i manage maybe 15-18MPG city driving only...even when trying to baby it.
Highway i can squeak out 24-26MPG, but only when cruising with the CC set. Minute i get off the highway, it drops like a rock.
I've run 89-93 octane with no difference in fuel economy really.
#220
G35's are really only fuel efficient on the highway at 75MPH with the cruise control set, downhil with a tailwind after taking a dump.
Other than that, getting mileage in the teens is somewhat normal. My AWD is a heavy bastard, and i manage maybe 15-18MPG city driving only...even when trying to baby it.
Highway i can squeak out 24-26MPG, but only when cruising with the CC set. Minute i get off the highway, it drops like a rock.
I've run 89-93 octane with no difference in fuel economy really.
Other than that, getting mileage in the teens is somewhat normal. My AWD is a heavy bastard, and i manage maybe 15-18MPG city driving only...even when trying to baby it.
Highway i can squeak out 24-26MPG, but only when cruising with the CC set. Minute i get off the highway, it drops like a rock.
I've run 89-93 octane with no difference in fuel economy really.
#221
I drove ttrank's car solo
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G35 sedan w/ too much money in mods
#222
#223
#224
I hope my ECU reset will do something, I am still waiting for my bluetooth OBD2 device to arrive, once I get it I will able to take screenshot of all the sensors and post the image here
#225
A honda civic hybrid is not a good comparison because when idling, the engine shuts off.
I hate to say it and be "that guy", but if you bought your g35 for fuel economy, you bought the wrong car. It's just not very efficient. My previous v8 mustang GT actually got better fuel economy than my G35.