Originally Posted By: eljefino
Circle track racers here run water all summer, and I don't think too many of them use "Water wetter" or similar additives.
I would stick to your schedule though.
I flushed my cutlass ciera by drain and filling once a week, all week, then putting pure antifreeze in at the end (as I only got 50% each time.) Solved a ping that I figured was caused by crud buildup/ hot spot.
Because the OP's Saab 9-3 is his circle track race car. I'm sure he's going to pull the engine at the end of the season and rebuild it, anyway.