Oil Changes

My 96 has just about 118000 miles on it. I have been using that Mobile 1 extended performance oil which says its good for 15000 miles or 12 months. I could never put on more than about 8000 miles a year so I change it every 12 months is that ok to do or should I change it more often?

Typically the recommended service interval for oils is mileage or time, whichever comes first. So, if you trust that a 12-month oil is good for 12-months, and you don't exceed the mileage recommendation during that 12-months, you should be fine changing it every 12-months.

-Rod