I'm actually playing around with going to HPL PCMO 5w30 in both of our vehicles. It seems, for the $$$, and my OCI's, it may be the best oil option period.
Crosstrek: Doing 3 month OCI's with Mobil 1 ESP 5w30 would cost me $148/year for the oil at the current prices. If I went to HPL 5w30 and went to 4 month OCI's, this would cost me $140/year at current 5 gallon HPL prices shipped to me. After 3 months I'm typically well under 3,000 miles, so I bet after 4 month's I'd not be much more than 3,000 miles. These FB GDI motors have shown to have some moderate fuel dilution issues, so I prefer to do short OCI's. Subaru calls for 3 month/3,000 mile OCI's for severe use, which includes short tripping.
Acadia: Doing 3 month OCI's with Mobil 1 EP 5w30 would cost me $167/year for the oil at current prices. If I went to HPL 5w30 and went to 4 month OCI's, this would cost me $177/year at current 5 gallon HPL prices shipped to me. After 3 months she's typically right around 3,000 miles, so at 4 month's she'd probably be right around 4,000 miles and still well below when the OLM tells her to change her oil.
So, for both vehicles it would cost us $2 more per year to move to HPL @ 4 month OCI's vs off the shelf oil @ 3 month OCI's. If HPL's standard PCMO is as good as everybody says it is, the decision is a no brainer.
I know the OCI's listed are -way- too short for a lot of you, however, with both vehicles being GDI I really want to error on the side of caution in the hopes it benefits us long term. We both pan on keeping these things awhile and want to do everything to limit the "issues" of GDI-only fuel systems long term.
Having said that.....thoughts??