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Old 05-09-2015, 09:57 AM   #5
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Join Date: Oct 2007
Posts: 19,899
The "old single weight oil" was probably what the engine was used to.

By using a more modern mullti-weight , your engine probably now has modern detergents eating at all the crud.

A leaking pan and other gaskets is normal when this change is made.

If its NOT the gauge the spring and ball in the oil pump pressure regulator will need to be cleaned..

Maybe the new oil will do it for you?

Old oil was rated CD (Compression ignition ) D grade additive package.

The new oil will be CF , the F being higher detergent
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