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In regards to warm up. I watch the oil temp and coolant temp on torque. Anything less than 10 miles is a short trip in my opinion. My car seems to take an eternity to warm up though. Even 55-60° outside and it take near 10 miles for oil to be completely warmed up and coolant around 7 miles. From 180° oil to 220° seems to be a large jump in economy. Just what I have seen. If my car started at full operating temp I could push 60 mpg everyday. Not to mention factoring in cold tires as well. If trips are that short you can bump up a few more psi to compensate for them never truly reaching temps themselves. I typically see 3-4 psi raise on tpms sensors on my 13 mile commute to work. Last 4-5 miles is where the warm up time is where the good Fe numbers show up.
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