/\ big +1 on the Z1 oil cooler (see sig). Don't foget to get it w/thermostatic plate.
PS--at Zcon track day this past week, our Z didn't go much over 240 deg. for oil temp.
PS--welcome aboard OP, oh and the Aug Roebling track day you're going to, is it the Flat Out motorsports one? If so, my wife will be there with our Z.