Hi all, 2012 mustang gt, had a couple questions regarding the maintenance of my vehicle. Currently at 17,500 miles. 1) is there a reason why people buy different brands of oil? The book says motorcraft oil...does it matter if it's mobil, royal purple, etc. as long as it has the certificate? 2) I found only pg. 335 of this .pdf from ford's website as a maintenance log. does it seem about right? From what I understand, I need to replace the cabin filter at 20,000 miles, then the engine intake filter at 30,000. am I missing anthing? http://www.motorcraftservice.com/pubs/content/~WOCMUS/~MUS~LEN/42/12musog3e.pdf Thanks for the help!