Quote:
Originally Posted by noflash
I think my slight drop and overall less than average fe has to do with my relatively short commute in cold weather. I have a 20 minute commute in the 20s-30s. I prob get 30mpg for the first 10 minutes and 50 for the 2nd, avg'ing at ~40 (or something like that).
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And you don't have the Engine Block Heater installed, right? I know msantos does but forget who else on the list has one installed. Let me know if your commute results compare to my description below of when I don't have the Block Heater plugged in before leaving the house.
Can someone with a Block Heater verify that they are seeing the same results that I do? With the Block Heater *not* plugged in it takes the car a good 5 miles to warm up where the Temp gauge is at 9 blocks and for the Auto-Stop to occur and it takes about 1-2 miles for hot air to come out of the vents (hot, not warm air). However, *with* the Block Heater plugged in for several hours it takes about 1-1.5 miles before the Temp gauge is at 9 blocks and about the same distance for Auto-Stop to work and has warm air instantly in the morning and hot air within about 0.5 mile. Is this what you experience?
I often have the same 22-mile commute to work (about 30-35 minutes) and keep writing down my results and keep averaging about 50.0 mpg. Note the results below - even on mid-30 F temp days I get 47-50 mpg and on 60-70 F temp days I get 47-50 mpg. Now I know the warmer temp days should be better but it is a hilly commute so it probably has more to do with wind and traffic than temperature. THIS is the difference that the Block Heater has even on short commutes (even morning trips of less than 7 miles yield me 45-55 mpg trips.
I remember doing a back-of-the-envelope calculation early on and discovered the Block Heater will get me 50 mpg for 20 miles while without it will get me 40 mpg for those same 20 miles. This is a loss of 0.5 gallons of gas each week that I drive to work so 10 weeks of cold temps means a savings of 5 gallons of gas. Not insane savings but better than nothing (enough to pay for two audio CDs every 10 weeks). It might even pay for the electricity that I use to warm the car. What a nice trade-off. =)
Results from nearly the same commuting trip during Dec with wide temp fluctuations from start to end.
Nov 30 = 23.1 mi @ 47.5 mpg @ 70 F
Dec 01 = 23.1 mi @ 48.5 mpg @ 56 F
Dec 05 = 21.7 mi @ 51.4 mpg @ 30 F
Dec 08 = 23.9 mi @ 44.0 mpg @ 23 F
Dec 11 = 23.0 mi @ 50.8 mpg @ 46 F
Dec 12 = 21.7 mi @ 50.6 mpg @ 59 F
Dec 14 = 23.1 mi @ 48.5 mpg @ 54 F
Dec 15 = 21.6 mi @ 53.6 mpg @ 53 F
Dec 19 = 27.0 mi @ 50.2 mpg @ 38 F
Dec 21 = 21.6 mi @ 52.3 mpg @ 43 F
Dec 27 = 23.2 mi @ 47.0 mpg @ 35 F
Jan 08 = 21.7 mi @ 50.3 mpg @ 39 F
Jan 09 = 27.9 mi @ 51.5 mpg @ 36 F