I think it's a 15W...narky, can't remember the rear numbers. I've been advised to use thicker oils during summer. Right now using Mobil 1, some say it's too thin, some say it's good cos it allows easier flowing and turbo engines like thinner oils. Your call, but I'm going to try Shell Ultra Helix this time round....after all Ferrari F1 cars use it :bahaha:
And the Mclaren team uses *tadaaaa* Mobil 1
If you've got extra cash to spend, use Redline engine oil!