[Healeys] detergent oils shell X100

[Norman Nock]

Detergent oil came on the market in the late 40's   oil filters started to
come on engines just after that ... in those early days I have removed valve
covers and push rod covers and there was so much sludge it covered the rocker
arms and the push rods ... If the then new shell X100 detergent oil was put in
 " The sh_t hit the fan " to solve the problem the valve cover , push rod
cover  and oil pan was removed and it all got steam cleaned ... Thats how was
... Norman Nock