Join Date: Apr 1999
Location: Justin,Texas, Republic of TEXAS (USA)
Feedback Score: 0 reviews
There will be no accelerated wear from doing a brief (less than 5 min) warm up and then drive off normally.
The accelerated wear WILL come from idling the engine unnecessarily.
Warm up is way old school from previous days when metallurgy was much less advanced and lubricants were far less developed than today. Old cast iron exhaust manifolds didn't like thermal shock but newer iron alloys in exhaust manifolds have low risks from a short warm up and drive off.
Condensation from idling a cold engine is a WAY bigger risk and is far more detrimental to the life of the engine. EGR systems HATE warm up idling. Variable geometry turbos HATE warm up idling.
Ford does not tell you to warm up the engine for very long at all. Their only recommendation is for a brief warm up in very cold conditions.
An idling diesel burns very little fuel and has very little heat as a result. The engine will reach operating temp much more rapidly with load of moving the truck.
Our fathers and grandfathers did lots of things that we now know are no longer necessary or wise. Be nicer to your truck, your wallet, and the environment and crank it up, idle briefly, and drive off.
If your truck is hooked to a trailer then you still need no more than a brief warm up. You can drive off easily. The easy drive off at low revs will warm engine up and warm up trans fluid via torque converter agitation. Idling out of gear does little to warm up auto transmission.
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