Use Subaru filters (or Ryco).

use mobil 1.

Redline engine oil is a waste of money (gearbox shock proof is a different matter!).

oil filter holds less than 300ml of oil, they would have added 500ml at most to top it up, it will be fine.

both oils contain polyol-ester synthetics anyway.

P,s sounds like someone left the old filter gasket on the filter mount during the last filter change.....unless your relief valve stuck shut, there's only 90psi of pressure in the filter, not nearly enough to 'crack' the steel can.

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