What would happen if a maintenance dose of Auto-RX was used with German Castrol in a moderately sludged 99' BMW engine and it was run for 3000 miles? Could the oil filter clog up by then? Would it do any cleaning considering the low dose and use of synthetic oil? Basically, what positive/negative effects would there be, if any? Thanks.
P.S. I'm asking for my car-lazy brother...if it were me I'd follow the instructions to a "T".
P.S. I'm asking for my car-lazy brother...if it were me I'd follow the instructions to a "T".