With this cold weather (or even normal winter conditions) my engine is not getting at all warm. My trip to work is just under 4 miles. I don't travel any other distance in the week. Weekends I may use the car but again, it may not get fully hot.

Could this be causing any potential issues such as more carbon build up. Would it be wise to take on a run at least once a week to get the engine and brake for that matter hot? Are there potentially more issues with a diesel not getting hot than a petrol?

I keep on top of oil changes due to the this.

Cheers

Marco