Importance of warming up a hydaulic drive?

[Mick Dempsey]

We’ll carry on doing it anyway Bob, after two years of being a nazi about it I can’t  backtrack now!

[Ratman]

Run down and run up times are to also allow temperatures to come up / come down too. A lot of people assume that it is the water / coolant that does the cooling of an engine..... well it helps yeah and is designed to flow through your engine and cooling system and pipes and radiator etc..... blah blah blah, but one of the major factors / players of engine cooling is also the engines oil believe it or not. Without good quality and clean engine oil the risk of damage to the engine and its components are at a higher risk of failure.
Oil that is left longer than its subscribed service life will get a bigger build up of carbon and contaminates as another use of oil is to also clean an engines internals.
The dirtier the oil the harder it is to perform and disperse heat etc, so allowing the engine to idle after use for a minute or so (on a turbo’d engine) is to allow for rpm’s / temperatures to come down and as described above by josharb87 will also prevent oil starvation to parts too yes. Even with modern oils there is still a risk, esoecially if they are not changed on a regular basis [emoji106]