My Honda City

It has been some time since I shared on my car fuel consumption performance. I have device a new method of computing the fuel consumption. What I do now is to pump a fix value each time, in this case, I always pump 26.04 liter. This value is based on RM50 @ RM1.92/Liter. For each of the fueling instances on the x-axis, I pump 26.04 liter and drive the car till it’s empty, which is till the light comes up and the indicator go to the lowest, most of the time hitting E and below. Then I pump 26.04 liter again. I find that by doing this, the fuel consumption are pretty stable at the average of 14.5km/liter and a Standard Deviation of 0.59. My stock tires which are Goodyear RCT are going bald and I will be changing them soon. Currently I am eyeing on Continental Contact 2 or Michelin Preceda 2. The Tires manufacturer always claim that their tires safe fuel, etc.. well, I will be putting them to the test. I will compare the fuel consumption before and after the tire change. Since I will be changing all 4 tires at one go, it would be a good estimate to see if what the manufacturers claim are valid. Oh, by the way, instance 2 and 3 was Caltex Techron and the rest were Shell Super.

Petrol: Caltex Techtron
Location: Tesco
Liter Filled: 39.42 liter
Distance Traveled: 614.8 km
Onboard Computer KM/Liter: 15.8 km/liter
Manually Computed KM/Liter: 15.6 km/liter
City Driving: 30%
Hwy Driving: 70%

This time round, some how with the new fuel consumption computation method, it seams to match up between manual vs on board computer. Much different from the last pump.

Petrol: Caltex Techtron
Location: Tesco
Liter Filled: 40.60 liter
Distance Traveled: 535.8 km
Onboard Computer KM/Liter: 14.5 km/liter
Manually Computed KM/Liter: 13.2 km/liter
City Driving: 50%
Hwy Driving: 50%

This is the second fill I use the new computation method, and again, it has a huge difference between the Onboard Computer and manually computed KM/Liter. Theoretically, the new computation method should be more accurate, but it differs the onboard computer. Will moniter a few more fill on this..

Petrol: Caltex Techtron
Location: Tesco
Liter Filled: 39.06 liter
Distance Traveled: 560.7 km
Onboard Computer KM/Liter: 14.5 km/liter
Manually Computed KM/Liter: 14.4 km/liter
City Driving: 50%
Hwy Driving: 50%

Petrol: Caltex Techtron
Location: Tesco
Liter Filled: 35.56 liter
Distance Traveled: 503.8 km
Onboard Computer KM/Liter: 14.1 km/liter
Manually Computed KM/Liter: 14.2 km/liter
City Driving: 80%
Hwy Driving: 20%