I do the same but keeping the speed limit from 70 -90 . Gives me about 19 kmpl mileage in our 18 year old Santro xing (with the AC on). People think i lie about my mileage figures.
This is coasting. I did that yesterday and it felt like I was lugging the car. Engine might wear out soon. Not worth it to save few rupees over fuel. Always stay near 2000rpm instead.
That's just going to use MORE fuel because oscillating speed increases your average wind resistance and also more losses through closed throttle. When you stop accelerating you have to put the transmission in neutral to remove the brake effect of the engine and whilst the engine will use a small amount idling (or you can turn it off but it's not as safe), you don't have to accelerate as often which is a net gain. The time to leave the car in gear is on bendy downhills where you'd go too fast and come off the road if you just let it roll. Or if you have to stop or go into a reduced speed or stop at the bottom of the hill (unfortunately sometimes lowered speed limits waste your momentum and thus fuel). On constant downhills you can sometimes trade a little bit of fuel idling for extra speed if you go down a hill at 65 in neutral and 55 in gear and both speeds are safe.
I do the same but keeping the speed limit from 70 -90 . Gives me about 19 kmpl mileage in our 18 year old Santro xing (with the AC on). People think i lie about my mileage figures.
This isn't pulse and glide but Pulse & coast, you're not gliding unless you shut off the engine. You need a hybrid car to do it safely.
I do the same
This is coasting. I did that yesterday and it felt like I was lugging the car. Engine might wear out soon. Not worth it to save few rupees over fuel. Always stay near 2000rpm instead.
That's just going to use MORE fuel because oscillating speed increases your average wind resistance and also more losses through closed throttle. When you stop accelerating you have to put the transmission in neutral to remove the brake effect of the engine and whilst the engine will use a small amount idling (or you can turn it off but it's not as safe), you don't have to accelerate as often which is a net gain. The time to leave the car in gear is on bendy downhills where you'd go too fast and come off the road if you just let it roll. Or if you have to stop or go into a reduced speed or stop at the bottom of the hill (unfortunately sometimes lowered speed limits waste your momentum and thus fuel). On constant downhills you can sometimes trade a little bit of fuel idling for extra speed if you go down a hill at 65 in neutral and 55 in gear and both speeds are safe.
Please do NOT film at such highspeed.. Please.. It's scary to see this video