The "what's your MPG" Thread
05-20-2008, 02:04 PM
#1
The "what's your MPG" Thread
With the ridiculously high gas prices these days it'd be good to hear about what kind of real-world mileage 2nd gen owners are getting. Please try to include % of city/hwy and if it's a 5AT or 6MT.
MOD EDIT:
Suggested format for MPG submission:
MOD EDIT:
Suggested format for MPG submission:
- Miles on the ODO (e.g. 6,000) (pertinent if you're still breaking in)
- Tranny: (e.g. 6MT or 5AT)
- City/Highway ratio guesstimate (e.g. 35% city/65% highway)
- MID mileage
- Actual mileage between fill-ups (miles traveled / gallons added = MPG)
- Octane used at last fill-up (indicating mileage achieved on that grade of fuel)(e..g "93 Top Tier," "93 Costco," "89 BP/Amoco")
05-20-2008, 05:47 PM
#2
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I'm getting 28.5 mixed city/highway and I'm on my second tank of gas since I bought the car. I was watching today as I was cruising on the freeway and it looked like I was getting 35+ on the highway.
05-20-2008, 10:14 PM
#5
Make a hole, coming thru!
Don't forget, also specify if your posted MPG is reported from the MID, or by calculating miles traveled / gallons added = MPG.
05-21-2008, 10:16 AM
#7
Make a hole, coming thru!
Information that will make posts useful for comparison
Suggested format for MPG submission:
You can get a handy-dandy spreadsheet for tracking your purchases here.
- Miles on the ODO (e.g. 6,000) (pertinent if you're still breaking in)
- Tranny: (e.g. 6MT or 5AT)
- City/Highway ratio guesstimate (e.g. 35% city/65% highway)
- MID mileage
- Actual mileage between fill-ups (miles traveled / gallons added = MPG)
- Octane used at last fill-up (indicating mileage achieved on that grade of fuel)(e..g "93 Top Tier," "93 Costco," "89 BP/Amoco")
You can get a handy-dandy spreadsheet for tracking your purchases here.
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05-21-2008, 12:56 PM
#10
Originally Posted by davidspalding
Suggested format for MPG submission:
You can get a handy-dandy spreadsheet for tracking your purchases here.
- Miles on the ODO (e.g. 6,000) (pertinent if you're still breaking in)
- Tranny: (e.g. 6MT or 5AT)
- City/Highway ratio guesstimate (e.g. 35% city/65% highway)
- MID mileage
- Actual mileage between fill-ups (miles traveled / gallons added = MPG)
- Octane used at last fill-up (indicating mileage achieved on that grade of fuel)(e..g "93 Top Tier," "93 Costco," "89 BP/Amoco")
You can get a handy-dandy spreadsheet for tracking your purchases here.
I tried putting the 09 TSX and 08 accord into the side-by-side comparison and the fuel costs for the TSX are LOWER than both the accord i4 and v6, even with the requirement for premium. is that accurate?
05-22-2008, 10:50 AM
#13
Senior Moderator
Originally Posted by 5thTo2nd
I tried putting the 09 TSX and 08 accord into the side-by-side comparison and the fuel costs for the TSX are LOWER than both the accord i4 and v6, even with the requirement for premium. is that accurate?
05-22-2008, 01:17 PM
#14
thanks mod! you guys have great powers! 
That site has since corrected the numbers regarding the Accord/TSX.
According to their calculations, the difference in fuel costs btw a 4-cyl 08 Accord and a 09 TSX (both auto) is only $37 a year! (assuming 45% highway driving, 55% city driving, 15000 annual miles and Reg. Gas: $3.72 per gallon, Prem. Gas: $3.94 per gallon)
Maybe the TSX's direct injection plays a part in the improved mileage? After all, it did gain some weight.
That site has since corrected the numbers regarding the Accord/TSX.
According to their calculations, the difference in fuel costs btw a 4-cyl 08 Accord and a 09 TSX (both auto) is only $37 a year! (assuming 45% highway driving, 55% city driving, 15000 annual miles and Reg. Gas: $3.72 per gallon, Prem. Gas: $3.94 per gallon)
Maybe the TSX's direct injection plays a part in the improved mileage? After all, it did gain some weight.
05-22-2008, 02:33 PM
#18
Team Owner
Originally Posted by 5thTo2nd
thanks mod! you guys have great powers!
That site has since corrected the numbers regarding the Accord/TSX.
According to their calculations, the difference in fuel costs btw a 4-cyl 08 Accord and a 09 TSX (both auto) is only $37 a year! (assuming 45% highway driving, 55% city driving, 15000 annual miles and Reg. Gas: $3.72 per gallon, Prem. Gas: $3.94 per gallon)
Maybe the TSX's direct injection plays a part in the improved mileage? After all, it did gain some weight.
That site has since corrected the numbers regarding the Accord/TSX.
According to their calculations, the difference in fuel costs btw a 4-cyl 08 Accord and a 09 TSX (both auto) is only $37 a year! (assuming 45% highway driving, 55% city driving, 15000 annual miles and Reg. Gas: $3.72 per gallon, Prem. Gas: $3.94 per gallon)
Maybe the TSX's direct injection plays a part in the improved mileage? After all, it did gain some weight.
1. the Cd, aerodynamic friction, could be lower on the TSX
2. the gearing (5th gear ratio) could be to the TSX's advantage
3. the hp/tq curves (this has an effect on selecting the gearing ratios)
4. the tires and their rolling resistance
05-22-2008, 02:38 PM
#19
Team Owner
Originally Posted by 5thTo2nd
Originally Posted by wikipedia
In an Engine Management System (EMS), electronics control fuel delivery, ignition timing and firing order. Primary sensors on the system are engine angle (crank or Top Dead Center (TDC) position), airflow into the engine and throttle demand position. The circuitry determines which cylinder needs fuel and how much, opens the requisite injector to deliver it, then causes a spark at the right moment to burn it.Early EMS systems used analogue computer circuit designs to accomplish this, but as embedded systems became fast enough to keep up with the changing inputs at high revolutions, digital systems started to appear.
Some designs using EMS retain the original coil, distributor and spark plugs found on cars throughout history. Other systems dispense with the distributor and coil and use special spark plugs which each contain their own coil (Direct Ignition). This means high voltages are not routed all over the engine, but are instead created at the point at which they are needed. Such designs offer potentially much greater reliability than conventional arrangements.
Modern EMS systems usually monitor other engine parameters such as temperature and the amount of uncombined oxygen in the exhaust. This allows them to control the engine to minimise unburnt or partially burnt fuel and other noxious gases, leading to much cleaner and more efficient engines.
Some designs using EMS retain the original coil, distributor and spark plugs found on cars throughout history. Other systems dispense with the distributor and coil and use special spark plugs which each contain their own coil (Direct Ignition). This means high voltages are not routed all over the engine, but are instead created at the point at which they are needed. Such designs offer potentially much greater reliability than conventional arrangements.
Modern EMS systems usually monitor other engine parameters such as temperature and the amount of uncombined oxygen in the exhaust. This allows them to control the engine to minimise unburnt or partially burnt fuel and other noxious gases, leading to much cleaner and more efficient engines.
05-22-2008, 02:42 PM
#20
Senior Moderator
Has that site actually done a head to head of both cars?
I don't think fuel concerns should even be considered when comparing a TSX to an Accord considering how close they are. A few hundred a year either way in gas isn't a big deal.
I don't think fuel concerns should even be considered when comparing a TSX to an Accord considering how close they are. A few hundred a year either way in gas isn't a big deal.
05-22-2008, 10:31 PM
#23
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I'll use the format suggested. Filled up for the first time today when the low fuel light came on.
- Miles on the ODO (e.g. 6,000): 465
- Tranny: 6MT
- City/Highway ratio guesstimate: 85/15
- MID mileage: 26.4mpg
- Actual mileage between fill-ups: 27.4mpg (445miles/16.2gal)
- Octane used at last fill-up: 91 Conoco
05-23-2008, 01:16 PM
#24
4dr & I like it that way
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the avg speed as reported by the MID would also be useful to have, it would give a good indication as to how much idling you had to do on a tank
06-06-2008, 09:57 AM
#28
Burning Brakes
The compression ratio is higher for the Euro/JDM/TSX compared to the Accord. Lower octane fuels combust easier than high octane. If lower octane fuel is introduced into a high compression engine, it will result in pre-detonation AKA engine knock. This is because the pressure from the pistion coming up will cause the air/fuel mixture to combust instead of having it properly combust using the spark from the spark plug.
93 octane for me, topped off a tank last night.
Miles on the ODO (e.g. 6,000): 425 est.
Tranny: AT
City/Highway ratio guesstimate: 90/10
MID mileage: 25.5 mpg
Actual mileage between fill-ups: 24.7mpg (445miles/16.2gal)
Octane used at last fill-up: Factory/Dealer fill. I usually stick with BP tho.
93 octane for me, topped off a tank last night.
Miles on the ODO (e.g. 6,000): 425 est.
Tranny: AT
City/Highway ratio guesstimate: 90/10
MID mileage: 25.5 mpg
Actual mileage between fill-ups: 24.7mpg (445miles/16.2gal)
Octane used at last fill-up: Factory/Dealer fill. I usually stick with BP tho.
06-06-2008, 10:06 AM
#29
Burning Brakes
Eh, maybe my City/Hwy is more like 95/5. I've been just driving it back and forth to work, no real highway driving but ive been lightengin up my lead foot. I've done some crusing at highway speeds tho but no real expressway driving.
Please ignore the acutal mileage calc, I just copied it from above
Please ignore the acutal mileage calc, I just copied it from above
06-06-2008, 04:20 PM
#30
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We have a 2008 AT model with 2,400 miles on it using premium 91 octane fuel. Around town it seems to get a consistent 19.5 mpg and on the freeway at 75 mph speeds, it is a consistent 30mpg. My past experiences with Honda products tells me the mileage will improve at about 10,000 miles at which point my expectations will be 21 mpg city and 32 mpg highway under the same conditions. We'll see and if they don't change much, I won't be disappointed either.
06-06-2008, 04:33 PM
#31
Originally Posted by GusterFan
Is everyone using premium fuel on their new TSX? I know it is a higher compression engine, but is anyone going with 89 or 87?
06-06-2008, 06:34 PM
#33
Make a hole, coming thru!
I've topped off with 87 into a 2/3 tank of 93 a couple of times ... and a few more times, I've put up to 8 gallons of 89 in a tank with 93, thinking that they'll slosh around together in the tank and even out. Yeah, right. Lately, with the Shell card rebates, I've just been going with 93. Particularly in warm weather, I want what's supposed to go in there. (Though, now that I think about it, maybe I really want to stringently use 93 with "winter gas" which has ... something ... more additive ... which makes it's mileage capability lower. IIRC. Someone help me out here?)
06-06-2008, 08:57 PM
#34
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Originally Posted by GusterFan
Is everyone using premium fuel on their new TSX? I know it is a higher compression engine, but is anyone going with 89 or 87?
Regardless, I've always driven my premium required vehicles using 89 octane, and have never had any ill effects on mileage or power/longevity.
06-06-2008, 10:58 PM
#35
I've always run super in the S2000s, but in the TSX I'm willing to experiment. The car is a 2008 6-MT and I've got about 1500 miles on it. The first tank was super and the MID was showing me 29. The second tank was mid-grade and MPG dropped by 1 to 28. The third tank is regular and at 3/4s through, I'm hovering around 27.
Very interesting. I am planning on filling with Super on the next tank to try to verify if the changes I'm seeing are related to the gas. Obviously, I expect mileage to get better as the engine loosens up, but it does not seem like that's happening. Obviously this is anecdotal at best, but I'm trying to keep an eye on it. My driving mix is probably 70/30 (highway/city)
Very interesting. I am planning on filling with Super on the next tank to try to verify if the changes I'm seeing are related to the gas. Obviously, I expect mileage to get better as the engine loosens up, but it does not seem like that's happening. Obviously this is anecdotal at best, but I'm trying to keep an eye on it. My driving mix is probably 70/30 (highway/city)
06-07-2008, 12:01 AM
#36
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Filled up for the 4th time today..Im now officially getting 29.5 mixed highway/city. Couldn't be happier, I'm extremely happy and this is the reason I bought the car and am glad they kept this engine configuration. Gas is now officially $4.60+ here in SoCal.
06-07-2008, 11:59 AM
#37
Make a hole, coming thru!
$4.60+Another in my Why I Love My New Home series: the nearby Shell station has nearly the best prices of any in the area. $4.13 for 93 octane. (/me chokes on the irony.)
06-07-2008, 06:52 PM
#38
All I can say is lets hope that we don't have a major crisis in the world as we are sitting on the edge of catastophy with oil at $140/barrel!! Our western economy is on the brink of collapsing should something would disturb the oil market OR speculators don't stop their fear spreading...imagine, just saying they think oil will hit 150/barrel shot the oil by 10/barrel in one day....I cannot understand why investors who spread so much fear and spook the market are not prosecuted...They are creating havoc in the whole world for their OWN financial gain..TERRIBLE! Sorry for being off topic but our gas mileage and gas price are somewhat related to my comments, food for thoughts.
06-08-2008, 08:37 AM
#39
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Originally Posted by davidspalding
$4.60+Another in my Why I Love My New Home series: the nearby Shell station has nearly the best prices of any in the area. $4.13 for 93 octane. (/me chokes on the irony.)
06-08-2008, 01:09 PM
#40
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Originally Posted by larryziegler
:P~~ I just had to pay $4.51/gal at Costco yesterday for 91 octane. That sucks!!