Which octane for an 89 305 Camaro

@lrdl3535 (149)
United States
September 9, 2012 7:38pm CST
I have an 89 Camaro and I can't find what octane to use. Does anyone know which octane level to use for this car. I am do for a smog check and want to run what is best to help it pass.
No responses