Per my diesel tech at Ford..
Short drives are fine so long as you get the RPM up and get everything up to temp. Idling the newer diesels is not good, especially the 6.7.
I still have my issues with mine shuttering during regen from me sitting in too much traffic. Ford has a reprogramming fix but won't come out till first quarter next year.
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2015 XLR Nitro 30FQSL
2015 F250 King Ranch
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