Why does a Diesel run thicker oil? The clearances are usually tighter, such as the .0002" wrist pin bushing clearance specified on the Cummins 855 connecting rods I reconditioned. That's a strand of hair split into 10 equal slices. Put some thick oil through that size space sometime!
Jerry

Last edited by Hotrod Lincoln; 12/19/2013 3:18 AM.
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