I guess it really is true that time flies when you're having fun! Because six months went by in the blink of an eye and it's already time to change the oil in my '15 Challenger SRT 392. This is technically the last time that I "have" to follow the six months part of the change interval since my CPO Extended Warranty will be up in November. So ... here's the photographic proof of the oil change taking place right on schedule. Seven quarts of Pennzoil Ultra Platinum 0W-40 (6 for $51 from Amazon + 1 for $12 from NAPA = $63) and a Mopar/SRT #041 Oil filter ($14 from Amazon) for a DIY cost of $77.