Suggested oil change interval

#1
I have a "If if were your Corolla" question.

Mine is a '98 LE with ~73K miles; starts and runs pretty much like a new one; does not consume oil. A couple of oil changes back I started using full synthetic, currently running Pennzoil 5W-30 Platinum High Mileage--next change I may try something different.

My question: If it were your car, how many miles would you put on this oil between changes? (I'm less interested in your opinion of Pennzoil)

Personally, I put literally about 5-6K miles on this car in a year.... maybe 7K.

-thanks!
 
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