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Old 03-31-2018, 03:03 AM   #6 (permalink)
ksa8907
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Speaking to the engine temperature and load, it depends on how cold and how much load. Low RPM(sub 2000) and relatively high load(under 60%) with 80F coolant I would think is relatively safe, be cautious.

Below freezing, 3k RPM, 80% relative load might be asking for problems.

Use a block heater and you'll see benefits in longevity and fuel economy.
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