I have manual and also I have a display of current fuel consumption. When you put it in neutral while moving ( so you can roll a bit forward in traffic when not on flat road ) the fuel consumption skyrockets. I have checked with my parents’ car and it also does that.
In: Engineering
The units of fuel efficiency are miles per gallon, or liters per 100 kilometers depending on your country’s measurements. I’ll use the latter because it’s easier to talk about. How much fuel is burned to travel a fixed distance?
If you are just crawling forward, how long does it take to travel 100 kilometers (around 65 miles)? Basically days. How much fuel would you burn in a few days even at idle? Many many liters/gallons – I think I estimated my car would drain its fuel tank at idle in about 2 days.
So, yeah, the efficiency of moving at a snail’s pace while the engine is running even at idle is mathematically really bad.
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