So technically putting the car in neutral will save gas due to less resistance, but it's a very very small amount. Tldr: neutral is slightly better at conserving energy and therefor gas, however it's barely worth the time shifting in and out of gear at every stop light. 3. SilverbackRibs • 8 yr. ago. This may have been discussed here before. Do you turn On/OFF your vehicle again and again, again and again or you let engine running but remain idle when at restaurants customers waiting for orders Besides wasting gas or possible theft at running engine while idle, is there more wear and tear If I lower the idle timing too much the map will stay in the upper 50kPa range and additional idle timing gets pulled. If I set the idle to 16 degrees that creates too much map. If I set it to 18 degrees the map will settle when the car is at a stop. I don't want to set the idle timing too high to avoid this. Those are very, very conservative calculations. Some numbers cited by various no-idle campaigns estimate that 10 minutes of idling uses about 0.1 gallon of fuel (for a small car). If you idle 10 minutes a day, it adds up to more than 35 gallons a year. And it only takes 10-15 seconds worth of fuel to restart the car. Task Scheduler checks for an idle state using two criteria: user absence, and a lack of resource consumption. The user is considered absent if there is no keyboard or mouse input during this period of time. The computer is considered idle if all the processors and all the disks were idle for more than 90% of the last detection interval. Those outfits used about 15 gal/hr at speed (3-4 mpg then). I recall being told they used 1 gal/hr at idle = 0.017 gal/min or 0.083 gal for 5 minutes. Assuming the gas burners were similar, burning about 1/10 at idle as at speed, your car would then burn about 0.1 x 0.25 gallons = 0.025 gal/5 minutes at idle. Reason 1: Well, it is the most obvious one- you are wasting fuel. When you let the engine idle, fuel is being used by the vehicle. That an engine consumes more fuel to stop and then start again The only reason to let your car idle in the winter before getting in is to defrost the windsheild, get the heat a little warm, and let the heated seats (if you have them) knock the chill off before you get in. There is no evidence that shows it helps the engine anymore to let it idle vs. driving easy. Don't worry about the engine in the cold. Idling Stop system temporarily disconnect the motor is able to disconnect the engine when the car stops 3 seconds and restarted as soon as the throttle back without having to press the start button. Idling Stop function is equipped on new vehicles by Honda PCX, Click, Air Blade etc. help save fuel and environment friendly. Team-BHP lists some fundamental steps toward caring for your turbocharger. This is important as we keep hearing about premature turbo failures these days. Turbo's aren't cheap to repair or replace either; the bill can run anywhere between Rs. 50,000 - 2,00,000! While engines usually have an rpm limit of 5,000 - 7,000 rpm, turbos spin at up to L0Su.