This question has been asked many times. For more information than you've ever wanted, just do a little searching. When it's all said and done, MOST automatics are fine for neutral coasting. Some are good for coasting with the engine off, but most are not. Some are not good for coasting in neutral even with the engine on (my wife's Isuzu, for example; a transmission temperature indicator lights up).
Quote:
Originally Posted by Jay2TheRescue
Traveling @ 60 MPH on flat ground the engine runs @ ~1,500 - 1,600 RPM. If I shift into N at this speed the RPM's fall to ~900 - 1,000 RPM.
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Why so high?
Mine goes down to 550, same as idling in Park.
QUOTE=BEEF;116232]depending on the year (1995, I know) your car might DFCO which makes it almost useless to shift into neutral. no gas is better than less gas.[/quote]
Rarely. Most vehicles lose more energy from slowing down than they save by not idling the engine. Sure, DFCO means no immediate fuel usage, but it slows the vehicle which then has to be re-accelerated later. Each car differs, but I suspect that most do better with neutral coasting in P&G than trying to P&DFCO.
Plus, just because car
can DFCO doesn't mean that it does so immediately and dependably. There's a lot of variables involved in the computer's decision to DFCO, and they are different in each vehicle.
Linear Mode
