ive been using premium in my 73 318, but ive been wondering if it would be that big of a deal to go to regular unleaded, gas is getting higher 3.85 hear. what say? pay the extra 20 cents a gallon or go to regular?
"Premium" ( 91 octane :sign11: ) here in sunny So Cal is $4.30 / gallon plus ; over $5.00 in some areas :stop: !
I run "premium" in my daily driver '72 Coronet with its stock ( albeit with ignition upgrades ) 318 ; but , I have the timing bumped-up to its max-before-detonation setting , as the car just runs better that way
( better mileage and smoother performance ) .