Originally Posted By: Wheel
Is there any reason other than cost to not run this in a gas engine calling for SN rated oil if you aren't using an extended drain ?
Not at all. Looking at your Subaru application, it's probably much like my G37, with very conservative OCIs. They are not "diesel" oils, either.
Originally Posted By: ACEA_2016
Stable, stay in grade Engine Oil with Mid SAPS Level, intended for use as catalyst compatible Oil at extended Drain Intervals in Vehicles with all Types of modern Aftertreatment Systems and High Performance Passenger Car & Light Duty Van Gasoline & DI Diesel Engines that are designed to be capable of using Oils with a minimum HTHS Viscosity of 3.5 mPa s.
Cost wise per mile, you can do much better, because of more affordable container size and longer OCIs, but the lube is certainly suitable. If you want elevated HTHS without going higher on the phosphorus and keep the price in order, an E6 5w-30 HDEO would do the trick, too. Shell has one, and with a starting TBN of 11.0, it certainly will be extended drain capable.