Miles Per Gallon Feedback
Been trying to max out mpg lately. I can get a tank to avg 27mpg on 87 octane with 20% city/80% hwy. On the highway I put it in manual and lock it in 7th. On premium I got one tank to avg 29mpg. I noticed that with the adaptive shift logic sporty driving will cause the trans to stay in 6th even up to 70mph when in full auto. These figures are with the cruise pegged at 74 and gentle driving in the city. With normal driving and periodic hammering I have averaged 24 mpg over 2000 miles on 87 octane during the summer. Obviously pretty happy with this.
beware
Registered Member
Joined: Sep 2012
Posts: 1,638
Likes: 161
From: NJ
It takes 4 fill ups on the way down. Started with a full tank in New Jersey
1st fill up in Ashland, Va. 300 miles 12.1 gallons at a 7 11 to refill 24.79 MPG
2nd fill up in Dillon, SC 283 miles 11.356 gallons at a Loves truck stop 24.92 MPG
3rd Fill up in Lake Mary, Ga Exit 1 just before the Florida border Hess 301 miles 12.406 gallons 24.26 MPG
4th Fill up Lake Worth, Fl Hess 321 miles 12.231 gallons 26.24 MPG
All regular 87 Octane of course. Never use anything else.
No complaints from me on MPG on my G37S
Telcoman
Registered Member
Joined: Oct 2014
Posts: 491
Likes: 56
From: Tampa bay
averaging 20-21 mpg using 93-,i have on occasions switched to 87(Telcoman pursuit) and gas avg went up to 22-23, so nothing dramatic and it actually seemed to run the same, though i did drive it gently when using 87, so maybe that is the key overall...
Registered User
Joined: Apr 2010
Posts: 431
Likes: 65
From: San Diego, CA
No clue how you guys are averaging over 20 in the city, that makes no sense. I drive probably 60% city and 40% highway and I'm lucky to average over 19.
300 mile highway/road trip I averaged 24.5.
Now I do have the 6MT and I'm a little bit of a lead foot at times, but I tried for an entire tank to drive like a grandma and it didn't make a huge difference. This car to me is more like 15 city/25 highway. I'm not complaining mind you, just stating my experience.
300 mile highway/road trip I averaged 24.5.
Now I do have the 6MT and I'm a little bit of a lead foot at times, but I tried for an entire tank to drive like a grandma and it didn't make a huge difference. This car to me is more like 15 city/25 highway. I'm not complaining mind you, just stating my experience.
OMG, I just remembered where I've heard your SN before. It's been nagging at me since I first saw it.
Carry on, Furlow.
Last edited by Rochester; Feb 14, 2015 at 03:38 PM.
How many MPGs are you expecting to save by doing this and will the savings in gas account for any accident expenses that may result from said method?
Registered Member
Joined: Jan 2015
Posts: 620
Likes: 82
From: California, USA
'09 G37xS. I average about 19-20 MPG with 70/30 Hwy/City commute driving. I can't help but be a bit aggressive with the accelerator at times. I'm about at 100k miles so I'm about due for a set of plugs (gonna check my coils at the same time) this may help a bit on the mileage as well.
Are there also tire wear issues by doing this? I have 19s and at about $900 a set a minimal gas savings is not worth it at that point.
Are there also tire wear issues by doing this? I have 19s and at about $900 a set a minimal gas savings is not worth it at that point.
Registered User
Joined: Nov 2014
Posts: 168
Likes: 4
I think it can save you 2 mpgs.
Registered User
Joined: Apr 2010
Posts: 431
Likes: 65
From: San Diego, CA