But, I have read discussions regarding lowered zinc content in modern automotive oils due to emissions equipment. In my 250 inline 6 I have switched to Rotella T oil for diesel engines.


Joe
--------------------------
'67 Chevy C20 fleetside, 250 inline, 3 on tree, heavy duty clutch and brakes, heater, steel bed floor
-----------
"Tighten until the stud snaps, then back off half a turn."