I have always been led to believe that if you wanted to flow a lot of oil through a filter, to use a filter with a large micron number, otherwise oil gets by passed and is not filtered.
I've used Fram filters over the years and even though they were cheaply built, never had a problem.
I know that Wix and NAPA are excellent, but also know the marine people use Baldwin filters. Wal Mart even HAD a house brand that was also really well built.
Tried them all and never had one fail. O-ring gets loose, but that has been it.
Loren
