Switching from Premium to Unleaded

[meateater]

I drive a 96 corolla. I used unleaded gas from the time we got it in 1996 until it turned 6 years old when I switched to premium. I've been thinking of switching back to unleaded because of the high gas prices but a friend told me that older cars are supposed to use premium gasoline. Is this true?

Its best to consult your car manual to check what octane rating it needs.