Did you recently take on (or consider) a loan of 84 months or longer on a car purchase?
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Infiniti G35 Real World MPG
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Am soon taking a 600 mile highway trip with 4 people and luggage, will post est. mileage.
My 2005 G35x has been averaging 19.5 mpg to 21 mpg.
i suspect many of you use the 87 octane right?
Regarding gas type, I thought the owners manual recommends premium fuel, as that is what I have been using. Where does it say you can use regular?
Patty
1/ Higher octane will allow higher compression so the engine can make more horsepower. Newer computer controlled engines with good knock sensors will back off the timing to allow use of lower octane fuels. Should not damage the engine, you may notice a slight decrease in performance. I'm not sure about mileage though the above post suggests no difference.
2/ Most higher octane fuels (name brands) also contain more cleaners. Does it help in the long run??????? makes you kinda go hmmmmmmm.
I lower octane works for you, go with it.
Haven't used anything but Premium in it (91 recommended). Speedway sells 92, Shell 93. I seem to be able to tell a difference even between the 92 and 93. I've noticed some rattle/knocking when shutting down the engine with the 92 octane (Maybe I got a couple bad tanks of 92?). In my area, the difference between the cheap stuff and good stuff generally runs an extra dime/gallon. I'll fork over a couple bucks a tank to keep it running smooth.
MPG: Drive it pretty hard sometimes (why not?): only get around 13 - 15 MPG city driving. Highway is much better. Last fillup I calculated around 21 MPG. Didn't get it for the MPG. Got for the fun!
HWY:at 75mph we get 27MPG
CITY: from 30-55 we get 22MPG
COMBO: from 30-75 we get 24.5MPG
All at pretty spirited driving. We get up and go.
We use 93 octane. We are not in the cheapest state but not the most exspensive
either last at the pump was 08/25/05 paid $2.60 a gallon for 93 octane I live in NC
Have also checked w/ 89 octane and doesn't make a bit of difference on mpg, however using 87 is not recommended (mine knocked severely) the one or two times I tried it.
Gets 20-22 average (80%highway) on my commutes. I think my driving is just normal, I don't act stupid and I don't drive like a granny, but I do like to pass cars and occasionally get up to 90ish in the process.
City commutes and daily errands: 17.4 mpg
Highway (best on Atlanta-Seattle round trip - Wyoming at altitude - 75mph) 27.5 mpg.
Commute - no highway = 17.5 mpg
Trips w/ 80% highway = 23.5 mpg
I'm not at all disappointed.
........ cuml mpg
0-1000 20.5
0-2000 21.2
0-3000 22.1
0-4000 22.4
The engine feels a little more eagar with premium but it is very subjective.
I've taken the car on 2 longer trips and averaged about 24 mpg at 75-85 mph. I don't drive slow but I do try to drive smoothly.
I am considering a trade for an M35X though, mileage should be similar.