Engine preheat
Some Lyco engine recommendations suggest preheating if the ground OAT is below +6C.
Yet it is obvious that almost nobody in the UK does this, and indeed most cannot. Even most hangared owners are not allowed to use mains electricity in the hangar.
Is this a real risk?
The damage in the first few seconds of engine running must be almost totally related to the oil used. And I wonder if this is a fossil recommendation from the pre-multigrade days?