neutral coasting?
Senior Member
Joined: Dec 2008
Posts: 3,837
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From: Floating around the AUDM
Vehicle: X3 Sprint, S-Coupe Turbo
So I'm confused. Is it still better to coast in nuetral then? Except of coarse now your brakes take a slighter bigger load, wearing them quicker. Not sure if you want to calculate that into the equation...
If you're talking about coming to a stop at a red light, then yes. Coast down in gear.
If you're talking about saving gas as you drive down the freeway, don't coast down in gear.
Consider two 2001 tiburons cruising along the interstate at 60. They both have full tanks of gas at the start of this test.
Driver A lifts his foot off the gas and leaves it in gear. Tiburon A stops injecting fuel into the engine and begins to decelerate. After coasting down for 700 feet, he comes to a stop with a full tank of gas. (Neglecting the fuel he used idling after he got down to idle speed in 5th gear and popped the clutch)
Driver B puts tiburon B in neutral and lifts off the gas. Tiburon B is now idling and coasting down the freeway. After coasting for 2000 feet, he comes to a stop having used one fluid ounce of gas because his tiburon has been idling for the past ~20 seconds.
Now let's reconsider. Tiburon A is parked 1300 feet behind Tiburon B. Tiburon A will need to use MORE than a fluid ounce of gas to catch up to Tiburon B. Tiburon B has retained more energy and would travel much further if they both ran their gas tanks to empty.
Senior Member
Joined: Jul 2011
Posts: 1,021
Likes: 1
From: Illinois
Vehicle: 2010 Genesis Coupe 2L track
If you're talking about coming to a stop at a red light, then yes. Coast down in gear.
If you're talking about saving gas as you drive down the freeway, don't coast down in gear.
Consider two 2001 tiburons cruising along the interstate at 60. They both have full tanks of gas at the start of this test.
Driver A lifts his foot off the gas and leaves it in gear. Tiburon A stops injecting fuel into the engine and begins to decelerate. After coasting down for 700 feet, he comes to a stop with a full tank of gas. (Neglecting the fuel he used idling after he got down to idle speed in 5th gear and popped the clutch)
Driver B puts tiburon B in neutral and lifts off the gas. Tiburon B is now idling and coasting down the freeway. After coasting for 2000 feet, he comes to a stop having used one fluid ounce of gas because his tiburon has been idling for the past ~20 seconds.
Now let's reconsider. Tiburon A is parked 1300 feet behind Tiburon B. Tiburon A will need to use MORE than a fluid ounce of gas to catch up to Tiburon B. Tiburon B has retained more energy and would travel much further if they both ran their gas tanks to empty.
If you're talking about saving gas as you drive down the freeway, don't coast down in gear.
Consider two 2001 tiburons cruising along the interstate at 60. They both have full tanks of gas at the start of this test.
Driver A lifts his foot off the gas and leaves it in gear. Tiburon A stops injecting fuel into the engine and begins to decelerate. After coasting down for 700 feet, he comes to a stop with a full tank of gas. (Neglecting the fuel he used idling after he got down to idle speed in 5th gear and popped the clutch)
Driver B puts tiburon B in neutral and lifts off the gas. Tiburon B is now idling and coasting down the freeway. After coasting for 2000 feet, he comes to a stop having used one fluid ounce of gas because his tiburon has been idling for the past ~20 seconds.
Now let's reconsider. Tiburon A is parked 1300 feet behind Tiburon B. Tiburon A will need to use MORE than a fluid ounce of gas to catch up to Tiburon B. Tiburon B has retained more energy and would travel much further if they both ran their gas tanks to empty.
So why would you be coming to a stop on the interstate?
