10w30 original mobile here. Usually a motorcraft or fram filter. My motto, if it works, don't fix it.
But you still have to change the filter every 3000... Technically they are right. But id still change it every 5000 for safe keeping...
if it works, MAKE IT BETTER! lol. yeah, a filter can run up to about 7k before you get into trouble with it everyone's told me...i'll probably still change it around 5 because it costs the same as the mobil 1, but it'll be nice if i get in a $$ crunch ill change the filter asap and throw another quart in or whatever i lose in the process. i chose this for the performance over anything else.