I agree with Teacher on the single key in the ignition. I have always carried 2 sets of keys, my car keys on 1 keychain and my house, etc. keys on another. I usually just put the Porsche key, my Mobil speedpass and my gym membership card together (the non Porsche key items weight literally nothing, so I do not think there is any effect on the ignition switch). I just find that it does not take up any more space in my pocket, and prevents a bunch of keys clanging together while driving.
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