Mobile One Oil

I purchased my 10/977 RR Corniche 11 years ago. It had 46,000 miles. It now has 57,000 miles on it. I do not recall when I had the oil changed but it still looks clean and it is full. Do I still need to change the oil as often with Mobile One in the car. Thanks so much for the info. I listen to your show on public radio whenever I have the chance.

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@ Web Lackey, Please Remove.

I don’t think there is any such thing as “Mobile One” oil. Do you mean “Mobil?”