Originally Posted by MZ DAIZY

Got gas today and pumped about 10 gallons of regular (89) octane into MZ DAIZY Before I realized I pushed the wrong button on the pump. She’s been tuned for 93 octane. I figure there’s a mix of about 4 gallons of 93 to 10 gallons of 89. What should be my plan of action and how bad a F-UP is this?