Everytime the engine turns off in my 2022 Nissan pathfinder the timer continues and every 3.5 seconds on average the total fuel saved goes up by 1 mile. I know this because it has a timer that continues everytime the engine turns off. Currently it reads 13 minutes and 21 seconds off and 227 miles of fuel saved
How am I saving 1 mile worth of fuel every 3.5 seconds? I get 16.3 mpg and 18 mph on average after I’ve driven 2500 miles
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The purpose of that display is to convince you to love the “auto-off” feature and tell your friends to buy a Nissan Pathfinder. There’s no need for the display to be correct or truthful. In fact, exaggerating the benefit is more likely to achieve the desired effect than telling you the truth.
If I recall correctly, it’s just bullshit.
The government made requirements that cars had to emit under a certain amount of contaminants into the air by a certain year. They gave automakers a few years to rework their cars, so that the new cars would comply with the new regulations on pollutants.
Let’s say, for the sake of argument, that the regulation was that a car could not emit more than 5 liters of pollution per hour.
So some manufacturers tried their hardest, but their cars still emitted 5.1 liters of pollution each hour. What are they going to do about this?
Solution: They shut the damn car engine off when the car isn’t in motion. Now they’re under the 5 liters per hour.
It’s entirely done just to be within regulation limits. They just dress it up as a fuel saving measure. I mean, sure, it does save fuel, but that’s not the real reason for it.
Your Pathfinder burns between 0.4 and 0.8 gallons of gasoline per hour of idle. If you put that to ~~seconds~~ minutes that is 0.007-0.013 *and seconds that is 0.0001-0.0002*.
You burn about 0.613-0.056 gallons per mile driven *based on the economy you provided*.
You would have to not idle for nearly 9 minutes before you save a mile of fuel.
That is an average, and it’s calculating it based on how much fuel you’ve been using. A shutoff means it’s using almost no fuel, so it keeps calculating the average and giving you crazy high numbers. They need to make their algorithm a little smarter. I’d bet its the same algorithm that was designed for the Pathfinder before the auto-shutoff feature was added, so now it gets confused.
It lies.
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