David, thanks for the helpful info, but here is how I do it every 3 months.
1. Wash with Z7
2. Then with Z5
4. Finish with Z6
On the regular wash (every 2 weeks), I will just wash with Z7 and finish with Z6. Let me know what you think. Thank you.
2006 BMW 330i - Delivered 9/16/06
Black Sapphire | Terra + Poplar | Sport | Premium | PDC
Blacklines | 189 Wheels | CF Front Lips | Euro Headlights | Rear Fog Lights