I can usually get the mileage up to 13 or so if I do more freeway driving but the stop and go of city driving takes its toll. I'm wondering if I should switch to a higher octane gas. I keep the engine tuned pretty well.


1956 Chevy 3200, 1/2 Ton, 235 CI
https://photos.app.goo.gl/TQQo1YnFjs3U7xB57