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It depends on the poster. I'm engine off at most opportunities - at lights & low speed P&G. But not during most high speed P&G.
Open loop is enriched operation, when the ECU isn't on its fuel map. Cold engines run open loop. When the engine warms up, modern engines go into closed (more efficient) loop. You need an Ultragauge or Scangauge to know which mode your engine is in.
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Darrell
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
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