Quote:
Originally Posted by ljustin293
I'm thinkin about premium for one fill up and then mid-grade the next...is this a bad idea??
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I've been doing that on my '96 Z28 since it was new - never had a problem. I filled up with Premium (93), then at 1/2 tank fill up with mid grade (89). That averages out to 91 octane--which is considered premium grade. Helps save a little money gas-wise.