If it's done less than 10,000 miles it'll still use quite a bit. They don't stop using it until they've done some serious miles.
As to recommendations, every dealer seems to be different. Just use a good quality mineral till it's done at least 12,000 miles, and then switch to semi-synth if you like.
Personally, as long as it's oily, I'll use it. I've always used Halfords own brand.