Originally Posted By: bananaman82
The manual just calls for full synthetic 5-W30. I have been using that. I just dont understand what caused the "oilstarvation" how can I prevent this?
It depends how the starvation happend. When Subaru first went with the turbo 2.5's, they had banjo bolt screens that were notorious for clogging and causing oil starvation to the turbo.
In late model EJ's such as yours (without the banjo bolt screens), it's more common to see bearing failure from a variety of conditions (oil level being run too low, oil too thin for the application, etc.), but I don't know if that would be considered "oil starvation".
You need to find out exactly what kind of warranty you have now and what oil you are allowed to run. In all likelihood, for repairs made under SoA's "goodwill" you are only covered under a Powertrain Warranty for this particular problem
for one year or 12k miles.
The EJ's do not like to be run low on oil and some of them do not like to be run on Resource Conserving GF5 oil, regardless of the brand. If you want to follow what many enthusiasts run, go with the something from the Holy Trinity (Mobil 1 0W40, Rotella T6 5W40, or Euro Castrol 0W30/0W40).
If you're concerned about running specifically what's in the manual, go with
any GF5 5W30. I would change these at 3,000 miles maximum though and check your oil weekly. If you are modified at all (even a Stage I reflash), I definitely would not run a GF5 oil and would switch to a Holy Trinity oil after your 12 month/12k mile warranty is up (if that's what you have).
Many enthusiasts that want to run a "5W-30" while under warranty are also running Euro oils like Mobil 1
ESP 5W30 or Motul X-clean 5W-30. Some dealerships actually offer Motul X-clean is their premium oil, although it is technically not a GF5 oil.