CL9 auto
I understand that the auto box has a 'lock up' mode in top gear when cruising, also the top gear ratio is higher than in the manual meaning lower revs for the same speed. So given almost all of my driving is on highways (I live in the country) and the car is in top gear 98% of the time shouldn't I get better fuel consumption than a manual car?
Age and treatchery will always overcome youth and skill
Dunno about the CL9 but the auto CU2 has excellent fuel consumption if you're cruising on the highway at 110-120 km/h. I usually get around 7 liters/100 km if I don't abuse the VTEC too much
I think Honda designed the manual for better performance and the auto for economy. I'd give a kidney to get that sweet manual instead of this paddle-shift nonsense. The damn slushbox has weird ratios for the lower gears so it always feels either too low or too high... in-town driving just murders the fuel economy but it's surprisingly good on the highways.
Nice comparison between gear ratios of all the different TSX boxes (http://www.acura.com/DriveTrain.aspx...modelYear=2012) but I sure as hell don't know what they mean... would a smaller final drive ratio mean lower RPM for the same speed?
my best FC... 5.1l/100km.... Pump petrol at Sutton Forrest Shell, reset and drove off, did it for around 90km distance doing 110km/h on cruise control on M5. photo taken in the 70km plus mark. Was trying to see if it drop to 5.0l/100km but hit traffic jam and slow to a crawl and FC went back up to 6.0l/100km before going smooth again.
Best i've had was on BP Ultimate, did 650~KM, auto CL9 (8.8L/100KM)
My last fill up was terrible. I got about 520KM~ (11.8L/100KM). When i came to fill up the other day, i noticed that my L/100KM was slowly decreasing while i was on the highway (normally it just jumps from like 24L/100KM to 17L/100KM etc until it eventually hits the 8L/100KM range. It went down to about 11.5 and just started coming down by 0.01. Does anyone know why it'd do that??
The trip computer polls every 100m or so and spits out a cumulative average fuel consumption for the whole trip up until that point. So right after you reset after filling up at the servo you are doing a lot of driving in 1st gear so average consumption for the distance you have driven since you reset is quite high... once you are on the highway your consumption is low and so you notice the average consumption decreases gradually until it eventually approaches your instantaneous consumption. Even though you use lots of fuel when in 1st gear, the distance covered is small so its overall effect on the average consumption is outweighed by the large distances and low consumption of highway driving. Of course if you never do highway driving and your sole use of the car is stop-start in 1st or 2nd gear, then the fuel consumption figure will not decrease as you have observed.
Also, the longer you have gone without resetting your trip meter, the harder it is to make the fuel consumption average change (since it is taking the average of all the fuel consumption figures since you last reset which may have been many thousands of kms ago).
It's all to do with the mathematics of taking an average I reset my Trip A about 20000 kms ago, the fuel consumption is a solid 8.5 L/100km which pretty much never goes up or down. Then I use Trip B to see my fuel consumption per tank.
Originally Posted by pitiek
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