Ur probably correct. It's also known as the 'weasel clause'. 50% more oil is...'gross negligence' on the part of the owner.Ehhh. The owner's manuals are written by lawyers and corporate hacks as much as engineers. Any single one warning in the manual has a mix of all three agendas, and it's tough to know the respective proportions
And I realize the OP was 3 qts over. That much is a no-brainer problem.