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What are y’all seeing for mpg for city driving, and how many miles are on your car?
I have a 2013 G37 vert.
I got 18.4 mpg or so for years (city driving). As the years passed it crept down a bit to around 16.5 or so.
I’ve got 115K on the odometer now, and I just had the car in the dealer for a lot of overdue maintenance- replaced leaking struts, replaced leaking valve cover gaskets, replaced spark plugs, throttle body clean, replaced fluids: brake, diff, transmission. Also replaced leaking heater hose so a coolant flush was done.
I’m now seeing 14.1 mpg - calculated by system computer and verified by actual miles divided by fuel used.
I didn’t expect to achieve like new fuel economy, but I didn’t expect it to get WORSE!
Not sure how helpful this will be, but, 2008 Coupe, just clicked over 117k miles...
As you can see above, I am just under 180 miles with over ½ tank to go.
Keep in mind that while I am not in a "major city," my area is riddled with stop-and-go traffic due to clueless beach tourists and the like. Also, this is with AC on FULL lately due to the heatwave. On average I can go anywhere between 400-425 miles before the idiot light turns on.
At my next fillup, likely next month, I will do the manual calculation but the figures will still be in the same ballpark.
Edited to add: Filled up last night:
373/15.7=23.76mpg. This is with AC on constant due to "heat wave." Not bad for a 16-year-old Coupe.
Last edited by ILM-NC G37S; Aug 12, 2023 at 10:59 AM.
UPDATE: I just saw this thread and realized I never followed up.
It was the freaking spike protein. Really.
During the pandemic we stopped going out for lunch because the restaurants were closed. I brown-bagged it for about a year, but got tired of that. I started doing curbside or drive-thru, and then would find a nearby parking space, turn on some tunes, podcast, or audio book, and sit for 30 minutes while eating my lunch. That's a lot of gas with NO MILES. I added about 2.5 hours a week of idling, which affected my overall gas mileage. Now that the pandemic is over, I'm still maintaining this routine. My overall gas mileage is down, but it's not the car's performance, it's the way I'm operating it. I just hadn't paid attention to it until after I had a lot of service done last year. In the end, it is my excessive idling that is skewing my mileage numbers.
