I had my oil changed at Speedco after purchasing my Newell on the ride home. I think I made a bad choice with my 8V92 by selecting Rotella 10-40 when asked what I wanted! After reading the forum I understand that I should run Delo 100 straight weight instead! The new oil is 800 miles old, question is should I get it out ASAP or is it ok to run another few 1000 miles? Thank you, Robert
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