My new part-time job makes me drive a 1.62 miles distance from home. There's one traffic light about halfway the trip and a climb up followed by a climb down, both with the same length. The problem about this is that the distance is too short and the engine cannot reach its normal running temperature, no matter how hot is the outside air.
On the other hand, there's an alternative way: a 3.98 miles road with about 2 miles of freeway and then the engine can reach the optimal temperature way before I get to work.
I've been choosing the longer way when the engine is cold and the short way when the engine is already warm.
In terms of hypermiling and/or engine wear what would be your suggestions? Is it worth to always choose the short way no matter the initial temperature of the engine?
Warmup isn't THAT important. You would have to get double the fuel economy for the longer trip to pay off. You'll almost certainly save fuel by taking the shorter route and accepting that the engine won't warm up.
For engine wear, it would make sense to use an accelerated maintenance schedule, with oil changes closer together and using better oil. If you went the longer distance instead, your service interval could be longer (in miles) but you'd still do it as often (in months) anyway.
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