T'stat
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
I can tell you from personal experience that there are different levels of fuel at different temperatures. My truck changes from Dr. Jekel to Mr. Hyde at about 179*F ECT and about 160* EOT. Now it may just be from the programming on my truck, but temps definitely make a difference. I've already noticed an improvement in my fuel mileage since installing a correctly operating thermostat, even with extended warmup times from cooler than normal temps in my area.
The data you are presenting is substantially consistent with mine showing a sharply lower record of fuel economy for short trips / where engine do not warm.
For me that short trip mean as much as 4-6 miles before it really warms.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
According to my gauges it takes my truck about 12 miles at 65 mph to totally saturate and stabilize.
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
I am talking about warm enough to see the gauge about 3mm below the "max" and stabilize.
To reach your point, that is 12 miles --- and on the coldest days, that can be never unless I use a bubba shield.
I wonder if we can get a real time mileage measurement at each plot of the ECT and EOT and run a graph.
Notably, when mileage tests are done at EPA, I do not believe they factor in warmup, or DPF regen (not applicable to us... but still).
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