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Old 04-09-2011, 12:12 PM   #12 (permalink)
SentraSE-R's Avatar
Join Date: Jun 2009
Location: Bay Area, California
Posts: 1,485

Mean Green Toaster Machine - '06 Scion xB
Team Toyota
90 day: 48.92 mpg (US)
Thanks: 56
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EOC has a surprisingly large effect on mpgs when you're hypermiling. If you're averaging 60 mpg with EOC P&G, engine on 1/5 of the time, and averaging 30 mph, you're using .5 gal. on a one hour, 30 mile drive. If you NICE-on glide, your engine idles unnecessarily at at least .15 gph for 4/5 of that time. For a fuel-sipper like my Scion's 1NZ-FE engine, it drinks an additional .12 gal. in 48 minutes of idling time. My 60 mpg (30 miles/.5 gal) EOC P&G drops to 48.4 mpg (30 miles/.62 gal) NICE-on. That's a 20% penalty for engine-on coasting.

My SE-R idled at .22 gph. NICE-on P&G in my Nissan drops a 60 mpg EOC P&G from 60 mpg down to 44.4 mpg. The penalty for idle coasting is >25% with the Nissan, which has idle consumption similar to your truck.

That's why I can never top low 40 mpg in my wife's AT Hyundai Elantra. It has to have the engine running to lube the AT.

Boycotting Exxon since 1989, BP since 2010
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

Last edited by SentraSE-R; 04-10-2011 at 06:17 PM..
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