I didn't think it would be an obligatory number of miles.
Just general guide lines such as "engine coolant does not reach operating temperature during trip" or "engine spends half or more of the drive below operating temp".
Even with my new thermostat it looks like I will reach operating temperature some where between 1/2 and 3/4 of my drive to work in winter depending on how cold it gets.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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