With the right wheel cleaner 15 seconds should get you decent results on the majority of the vehicles.
Watch this video of this Soft-gloss with Tire Chemical at the beginning and the prewash you don't need to have the nozzles oscillate just have 3-4 turbo nozzles instead and the speed is adjustable for the high pressure pass http://www.youtube.com/user/hyvahyva#p/u/40/KVX6Zk7uEpg