I will change the plug every 25k. 72k is way too long, I think 172/182 are high performance car and we need good spark! Even you are planning to change at 72k, but better check the plug every year at least.
I recently use Denso, very good.
I use Moutl 300V 5w40, excellent. But I am thinking of useing Redline next time cos Clio Cup Race car do use them from my memory when searching the French Renault Sport site. Also, a local magazine test a lot of oil, Redline is the best overall. Motul is second.