I have 2 separate questions about my BMW warranty on my 2008 BMW. 1. Can having preemptive oil changes done at a certified BMW Indy shop possibly void my warranty? My shop is recommended in Roundel. 2. I have aftermarket BMW replica wheels installed that are within specs (identical) to what BMW offers for my vehicle as optional equipment. Does this in any way void my warranty? The wheels are mounted on NON run-flat tires. This seems silly but I ask because it seems BMW bends over backwards to find a way NOT to perform/pay for repairs under warranty and blame ANY service issue on the owner. Thanks.