Protec 101 4 months 400 miles, lots of cold starts. New Ford 390 engine, looks like the filter holds up good to 90 PSI oil pressure on cold start. Oil looked a lot better with less brass in it (each rocker arm has a brass/bronze bushing) than the previous oil change that had half the miles. Shell Rotella T4 15w40 oil is being used. Will extend OCI a lot after seeing how this looked.
