Couldn't find a thread on this with a few minute search so, I'm wondering, what's the verdict on Mobil 1 Extended Performance oils? I know there is a shortage of the regular 10W30 among other grades so last time I was at Wal-mart I could only find 10W30 "EP" Mobil 1 oils. Assuming I keep a regular interval (<5000 miles or so) is there any reason this oil would protect or lube any less than the regular Mobil 1? Car is a Mitsubishi Evolution VIII if it matters.