Optimum speed for economic fuel consumption on motorway

[pwuser152119181238]

Hi every one
I have to travel to Rahim Yar Khan from Islamabad, obviously through motorway, with 5 persons on board along with luggage. I have to strike a balance between fuel economy and travel time as we haven't any option to stay some where, need to travel continuously, with small brakes/rests. What should be the optimum speed to remain fuel efficient and also cover the long 840 Km distance in as less as possible time.
Car is Honda city 1.3 iVTEC. In Islamabad, I normally get 14+ avg with this car.
Suggestions/recommendations are requested from users who use this car on motorway.

[qsoomro14]

Between 80-100 to maybe 120 occasionally is the best mix of speed and fuel economy,my altis 1.6 2011 does 16-16.5 on long routes at this speed range.

[pwuser158913575038]

100-120 would be the best. My 1.3 idsi averages 15-16 continuous on this speed.

[pwuser152119181238]

As I mentioned earlier, in Islamabad with mix of urban and highway travel, I get 14+ with this vehicle. My actual tension is M4 and M5. As far as I know, only one OMC "go" (or something like this) is available and that too at M5 and close to RYK. No other fuel is available. I have never used this fuel and don't want to use it either. Also, I don't want to exit at any interchange just to refuel and waste time. That's why I needed opinion to cover the distance with tank being filled near Faisalabad

[qsoomro14]

You should never risk letting your fuel go below half on long routes if you dont know about the availability of fuel along your route. If you feel the need for fuel it's better to exit the motorway to refuel than wait for the next fuel station to come.

[pwuser152119181238]

Yes this is the core issue. Last time, I went in a bus and observed that no fuel station is available especially at M5. Only one station is available who sells petrol of GO company, never heard of before.

[farooqk80]

3k rpm

[Proverbial_Slang]

Speed and fuel economy are inversely proportional. 120Km/H is required for such long distances. For best fuel economy, remain at 80 Km/H

[pwuser152119181238]

What would be difference of fuel used for 120 and 80 km/h? I haven't problem in driving at 120 at M2. Since, fuel isn't available at M4/5, I have to double think before going at higher speeds.
Assuming avg to be 14 at 120, this car would only cover around 490 km, which is net distance from Faisalabad to RYK (M4+5). If avg goes below 14 at 120, I would have to exit near or after Multan to refuel, and any advantage of driving at 120 would vanish. Time saved at 120 would be lost in getting refueled, exiting and reentering M5, I suppose, albeit.

[aliaamar110]

110km/l is better
can get 15.5 to 16.5 km/l
if car is well maintained

[farrukhzeeshan]

If I were in your situation and having family in the car, I would never bother about average or which brand of fuel is available on the way. I will get my tank refilled as soon it gets to half, as in this weather who knows if you have to drive for hours at 10km/h or have to stand still upon closure of the road due to fog etc, I would use that fuel to occassionally turn the heater on and keep my loved ones warm.

Have a safe journey..

[anon35615524]

Its generally said that the best suited speed for max. fuel efficiency would be, when the speedometer needle is purely vertical on the speedometer (be it at 100, 120, etc.), however then, the max. speed limit is 120 kmph and it can't be exceeded.

So you can drive at 120 kmph, or the speed when needle is purely vertical on the speedometer, whichever is lower.

Do not rush, or drive fast or in a hurry, or without sufficient stops, etc. Its said that haste makes waste.

[anon35615524]

Dear just drive patiently. Do not overthink, as it makes matters complicated.

If you ain't comfortable at 120 kmph, then you may drive at 110~115 kmph. But driving at 100 kmph / below, it'll make journey laborious and hectic, no doubt fuel efficiency would be good at this speed.

If you are worried about fuel depletion, just take OFF from the motorway, where you think reasonable fuel stations can be there. Refuel / Top-up to the full, take break and have rest for 10~15 minutes, and then start the journey again.

[scholar.center]

If your car has tacho meter. Then drive at 2000-2200 rpm with highest g

[scholar.center]

Drive with highest gear.. it wiĺl give max fuel efficiency.

[scholar.center]

If car has no tacho meter installed then after attaining desired speed at highest gear, slightly decrease pressure on accelarator without decreasing speed for good fuel average.

[pwuser152119181238]

Sir I fully honor your opinion. I'm not concerned about fuel consumption, but I have concern about fuel exhaustion as fuel is not available at m4/m5. I could only see only one station of relatively unknown brand (GO omc). I don't to get in trouble if bad fuel gets in. I would like to exit instead of getting bad fuel. That's the reason I have asked this question. Most of threads available at this forum about m4/m5 have narrated about fuel unavailability.

[anon35615524]

atively unknown brand (GO omc)

IF by this you mean https://www.gno.com.pk/ , then its not at all bad.

[pwuser152119181238]

Yes this omc is having one outlet, if I'm not wrong, after Multan rest area (I guess 100 km from Multan). I haven't seen it in Islamabad so have no idea of fuel quality of this omc. I only use Total parco fuel, seldom get attock fuel.

[anon35615524]

I was going through its website, and found that it has at least 2 fuel stations in twin cities, where RON 97 is available, and one of such fuel stations is at Embassy Road.

It can mean that they have more than 2 fuel stations in twin cities, so IMO, not bad. No doubt, they can't be compared with Shell, Total, PSO, etc.