MPG comparison thread.
Thread Starter
Instructor
Joined: Feb 2011
Posts: 234
Likes: 12
From: Rocklin, CA
I have an 07 type s 5at and have been avging about 19-22, highest ive gotten is 29 for a short time, and ive been as low as 15 after i filled up and got stuck in traffic.
Advanced
Joined: Oct 2010
Posts: 51
Likes: 2
From: Illinois
I finally got around to writing the info down from my 2008 TL Auto.
AVG MPG: 25
AVG MPH: 29
Distance: 5943
Time: 196:02
6MT/5AT: 5AT
3.5/3.2: 3.2
I am close to 50/50 highway/city. I check the mileage at every fill up using the calculator in the Nav system (nice feature) and have been getting around 23-24 mpg lately.
AVG MPG: 25
AVG MPH: 29
Distance: 5943
Time: 196:02
6MT/5AT: 5AT
3.5/3.2: 3.2
I am close to 50/50 highway/city. I check the mileage at every fill up using the calculator in the Nav system (nice feature) and have been getting around 23-24 mpg lately.
Burning Brakes
Joined: Jun 2001
Posts: 1,175
Likes: 1
From: Northern VA
I've kept records since new ('06 6MT), and there's a pretty strong correlation for me between MPG and avg. MPH on my typical "suburb" commute.
23 mph= 21mpg
24 mph= 22mpg
26 mph= 23mpg
28 mph= 24mpg
30 mph= 25mpg
Also, I'm wondering if some of the MT folks are "gear holders" or "down shifters." I upshift around 2500-2700 rpm under normal driving, cruise around 1700-2000rpm whenever possible. This time of year when the temps are in between heat and AC, I usually gain about 1 mpg on average.
My wife, on the other hand, is a "gear holder." She'll ride in 3rd to 3500, just letting the tach hang there if she's not speeding up. She gets 1-2mpg lower than me under similar MPH averages.
23 mph= 21mpg
24 mph= 22mpg
26 mph= 23mpg
28 mph= 24mpg
30 mph= 25mpg
Also, I'm wondering if some of the MT folks are "gear holders" or "down shifters." I upshift around 2500-2700 rpm under normal driving, cruise around 1700-2000rpm whenever possible. This time of year when the temps are in between heat and AC, I usually gain about 1 mpg on average.
My wife, on the other hand, is a "gear holder." She'll ride in 3rd to 3500, just letting the tach hang there if she's not speeding up. She gets 1-2mpg lower than me under similar MPH averages.
Take a look at my post from a while back. Some interesting data on MPG vs. MPH that I had collected:
https://acurazine.com/forums/showpos...0&postcount=89
and here is some info another member had posted:
https://acurazine.com/forums/showpos...0&postcount=89
I have taken very similar measurements on one of my road trips before. This was on a cool fall day, so windows closed, no A/C. 5AT using cruise control and drove for roughly 10 mile stretches (didn't go that long for the ones above 90mph though) on pretty flat interstate with hardly a car in sight. Very similar numbers to above except at the really high speeds. (I wonder if that could be due to wind differences between my environment and the original poster's environment.) I had also noted the RPMs. Here were mine:
45mph (1500rpm) = 31mpg
50mph (1500rpm) = 36mpg
55mph (1550rpm) = 36mpg
60mph (1700rpm) = 36mpg
65mph (1800rpm) = 35mpg
70mph (2000rpm) = 33mpg
75mph (2150rpm) = 31mpg
80mph (2275rpm) = 28mpg
85mph (2400rpm) = 25mpg
90mph (2550rpm) = 23mpg
95mph (2700rpm) = 21mpg
100mph (2850rpm) = 18mpg
105mph (3000rpm) = 16mpg
45mph (1500rpm) = 31mpg
50mph (1500rpm) = 36mpg
55mph (1550rpm) = 36mpg
60mph (1700rpm) = 36mpg
65mph (1800rpm) = 35mpg
70mph (2000rpm) = 33mpg
75mph (2150rpm) = 31mpg
80mph (2275rpm) = 28mpg
85mph (2400rpm) = 25mpg
90mph (2550rpm) = 23mpg
95mph (2700rpm) = 21mpg
100mph (2850rpm) = 18mpg
105mph (3000rpm) = 16mpg
and here is some info another member had posted:
I now have 9000 miles on my car, and on my 6 hour road trip yesterday, I did another calibration of the MPG vs. MPH.
Cruise control at various speed, drive for about 5 miles to let the MID settle
6MT, at 6th gear
55MPH = 38MPG
65MPH = 34MPG
75MPH = 31MPG
85MPH = 27MPG
95MPH = 24MPG
105MPH = 21MPG
It was a bit difficult to keep the speed at 105 for 5 miles, kept coming up to other slow cars.
So for the rest of the way, I set the cruise control at 80MPH, and after 300 miles, it indicated 29MPG.
Going 55MPH would have been great for my wallet, but I would absolutely go crazy driving 4 hours at 55MPH. Come to think of it, if someone has the patience to drive 55MPH for the entire trip, you can get over 600 miles to a tank!
Cruise control at various speed, drive for about 5 miles to let the MID settle
6MT, at 6th gear
55MPH = 38MPG
65MPH = 34MPG
75MPH = 31MPG
85MPH = 27MPG
95MPH = 24MPG
105MPH = 21MPG
It was a bit difficult to keep the speed at 105 for 5 miles, kept coming up to other slow cars.
So for the rest of the way, I set the cruise control at 80MPH, and after 300 miles, it indicated 29MPG.
Going 55MPH would have been great for my wallet, but I would absolutely go crazy driving 4 hours at 55MPH. Come to think of it, if someone has the patience to drive 55MPH for the entire trip, you can get over 600 miles to a tank!
Last edited by jhumbo; Mar 22, 2011 at 10:37 PM. Reason: Added additional info: Quoting jtruman's post
2007 TL Type-S NBP
Joined: Jan 2011
Posts: 317
Likes: 7
From: Rexburg, Idaho
07 Type-S 6mt. If it's all lead footed city driving I get around 13. My last trip from Rexburg, ID to Salt Lake City, UT (about 250 miles with mountains) I got 27 on the tank going down with about 15 miles of city driving before I left. I got 29 coming back with about ten miles of city driving. The highway stuff was doing 15 over the limit, about a third of it at 80mph, the rest at 90mph. I was VERY pleased with my mileage at those speeds. I'm looking forward to my drive home to Wisconsin to visit family next month. I'm hoping I'll crack 30mpg! 
AVG MPG: 30
AVG MPH: 42
Distance: 1290
Time: 31:17
6MT/5AT: 6MT
3.5/3.2: 3.2
Just reset my MID because I replaced my battery. Recorded the info before reset. Daily driver, about 50/50 highway/city to work. Most of the highways are state highways, not freeways so it's about 60-65MPH cruising which is sort of the sweet spot.
AVG MPH: 42
Distance: 1290
Time: 31:17
6MT/5AT: 6MT
3.5/3.2: 3.2
Just reset my MID because I replaced my battery. Recorded the info before reset. Daily driver, about 50/50 highway/city to work. Most of the highways are state highways, not freeways so it's about 60-65MPH cruising which is sort of the sweet spot.
10th Gear
Joined: Apr 2011
Posts: 11
Likes: 0
From: Rockwall, TX
For every fillup I have the date, miles travelled, gallons, odometer mileage, and price per gallon. Looks real purty on a graph. 
Instructor
Joined: Apr 2011
Posts: 233
Likes: 13
My mpg varies greatly with the traffic conditions, but on the highway I can get 30mpg and ~20 in the city, averaging ~22 mixed. The highway driving is at 70-75, but i've started driving at 65 and now get 33mpg and that's with my summer tires which are super sticky and drop about 2-3mpg compared to my winter tires.
Thread Starter
Instructor
Joined: Feb 2011
Posts: 234
Likes: 12
From: Rocklin, CA
Is the free one good enough or did you pay 5 bucks for the full version?
Notice the number of miles driven.
This was a 450 mile road trip, a 250 mile road trip and the rest was driving around the Chicago area which means a good percentage of this is highway driving, but there is some city driving mixed in.
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