Hi, just curious what people are seeing on their temperature gauge once warmed up and driving? Typically the needle should always be about 12:00 is the old school guideline. (or I guess 6:00 on these, right?) Mine seems to be stopping quite a bit short of that. about 8-7:00. (1/4 - 2/3) I want to get the most fuel economy I can out of this thing and I am worried that I am running cold. Diesels are most efficient (usually) at warmer temps. Also it seems to fluctuate quite a bit? Just wondered if these are cold blooded right from factory? Thanks!