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Old 05-28-2013, 04:48 AM   #11 (permalink)
SentraSE-R
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Join Date: Jun 2009
Location: Bay Area, California
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Mean Green Toaster Machine - '06 Scion xB
Team Toyota
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Quote:
Originally Posted by jeff88 View Post
When I am cruising at 65 and I put the trans in neutral the UG shoots up to some crazy MPG # like 300. But at lower speeds, the MPG in neutral is lower (like 250, 200, sometimes less than 100 at lower speeds). At first this made sense to me, because I have more momentum from the higher speed, but after thinking about it and verifying today, the engine revs at ~1,000 RPM no matter what speed once I put it in neutral. So my question is why I get higher mileage at higher speed (in neutral) compared to lower mileage at a lower speed (in neutral)?

Thanks!
Because you're traveling a greater distance per given amount of time, and per given amount of fuel used at idle , at the faster speed.

To answer an earlier question in this thread, don't use a kill switch with most automatics. They typically have to have their engines running to lubricate their transmissions.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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