Originally Posted by 79letour
My car does see 5k occasionally and definitely has been run at "operating temps". But the only time the OP light comes on is driving around at 35-40 mph.
35-40 mph so you can induce the light? or is it spiradic? Try to induce and make a note of the RPM then match the rpm at another speed to see if its RPM dependent. Its also you mentioned it being 3/4 qt low. Could you see that on the dip stick or do you think the Dealership was saying that to provide a probable cause to a unique problem