Never Fill A Cadillac SRX Turbo With Regular Unleaded GasGunnar Heinrich3/24/10 2:00pm4302EditPromoteDismissUndismissHideGo to permalinkGunnar Heinrich, editor of AutomobilesDeluxe, recently mistakenly filled a press fleet Cadillac SRX Turbo with regular unleaded fuel. The result? A catastrophic "mega knock event." His semi-harrowing tale of sudden unintended highway deceleration below. — Ed.