Re: Royal purple or mobile 1 engin oil
Mobil1 is fine, so is the pennzoil stuff. As long as it's a good synthetic you'll be fine whether its Valvoline, Pennzoil, Mobil1 etc. Also, get a good filter...K&N, Mobil1, etc. Personally I think Royal Purple is overkill.
2015 Billet Silver
2012 300SRT, 2009 Jeep SRT, 2006 Charger SRT
Too many mods to list for each, so let's just say a lot was done over the years.