I am gobsmacked at how cheap oil is in large quantities.
So, would anyone like to buy some v. v. cheap (less than half price) fully synthetic oil, custom mixed for high revving engines and for track use - currently we're going for 10W40 as a decent compromise. Dunno if your turbo things need W50/60 oil, but there you go.
PM me if you want price/details etc., but it will around 50-70% cheaper than buying it in Halfords.

James