Unless you've done plenty of laps, you'll not really be going fast enough to bother oil temp I wouldn't have thought, unless it's a blisteringly hot day. Don't labour the car up Kesselchen, and you should be OK, I'd be more worried about brakes than oil, unless you have those dialled in already? I'm in Sheffield, and have a cheapy oil temp gauge that I was going to use before I stumped up the money for an additional defi gauge and sensor. You're welcome to it, you'll just need somewhere to screw in a 1/8npt sensor, and wire the thing in.