Short journeys, cold starts, normal driving in normal temperatures in the UK 5W-30.
Track use, monitor your oil pressure during the session and see if it falls off. If so, and assuming you're managing oil temperature, consider a different grade. Maybe here a 5W-40 is beneficial. A '40' grade oil is thicker at 100C than a '30' grade.
Above all, and this isn't brand specific, choose an Ester based oil.
http://www.bobistheoilguy.com/esters-in-synthetic-lubricants/Any premium brand brand meeting the grades which is Ester based will do the job nicely.
Personally I would go with '30' grade as I know it will flow faster around my engine under normal operating conditions. Yes the pressure will be lower (remaining within prescribed limits), but the flow rate will be up ensuring fresher oil at all of the vital components.
If it burns a little oil so be it. This is also accepted and is a worthwhile trade off to ensure good flow of fresh oil around the engine.
Topping up every now and then also helps keep the oil fresh.
I do 4/5k miles a year and many of my journeys are 5 miles each way commuting. Because of this the oil temp by the time I get to work has just equalized with the coolant temp and therefore only just got anywhere near an optimal operating temperature. For this reason I do an oil change every 6 months, albeit without a filter at the intermediate change.
On a properly warmed engine the oil will be about 5-10 degrees warmer than coolant.
