Ben Oil filters were an optional extra and they are of the bypass type. As long as you use a non detergent oil which take out all sorts of bits the engine should be ok. My M has not got a filter and has been fine for the 15000 miles. Darell
#5503
Darell Allard
Participant

Ben

Oil filters were an optional extra and they are of the bypass type. As long as you use a non detergent oil which take out all sorts of bits the engine should be ok. My M has not got a filter and has been fine for the 15000 miles.

Darell