Two ways to look at it: $2 is peanuts, or with a 7500 mile oci, either oil will be fine. Both viewpoints are true...you can’t go wrong with either.
The Vanilla Mobil-1 may be shot at 7.5k. The EP may have a few thousand left in life.
There is a reason why EP sells for more money. It's a better, all-around oil. To me, I'm saving $2.... not spending extra $2 for it.
Yesterday's original Mobil-1 Vanilla is today's Mobil-1 EP.