LegacyMike98 Posted January 7, 2017 Share Posted January 7, 2017 Hi all, I have a 1998 LGT, AT, 215K miles. Recently, a co-worker suggested that I try using a diesel intended engine oil. Specifically the Shell Rotella (550019921) T6 5W-40 Full Synthetic, Heavy Duty Diesel Engine Oil (CJ-4). In addition, he said that I would need a larger oil filter with this type of oil. So, my question is, has anyone been doing this with their older engines and would the Subaru 15208AA15A Oil Filter be okay to use instead of the 15208AA12A Oil Filter? Thanks! Link to comment Share on other sites More sharing options...
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