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Old 02-03-2012, 12:01 AM   #66 (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)
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^^^ My thoughts exactly, Mech. I've been driving to keep the cat lit, and observing FE with engine-on P&G. The UG's cat temp display must be an estimate, based on its observed behavior. I started with a cold engine, with cat temperature starting <100F. Within 3 blocks, the cat was supposedly up to 900F. If I kill the engine, the cat temp displayed (900F, for example) doesn't drop. When I restart the engine, the cat temp display always starts recounting at ~100F, even when it was showing 1200F 30 seconds earlier. So, it's not very believable.

Since I didn't EOC on highway trips, I won't see any FE loss there. I just tanked up in preparation for such a trip. The UG indicated 43.2 mpg estimated, with the entire 215 mile tank driven engine-on. I always err on the conservative side, so every tank is at least as high as the UG estimate. Actual FE for the tank was 50 mpg! It was probably a short fill.

dcb, sorry I haven't gotten back to you. I've been busy the past 2 days, and won't have Internet again until Sunday night.

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; 02-03-2012 at 01:27 AM..
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