minus-squareMakeH20@alien.topBtoMechanic Advice@gearhead.town•2012 Honda civic lost roughly 20 percent on miles per gallon after oil change.linkfedilinkEnglisharrow-up1·1 year agoThey probably put synthetic blend and/or the wrong weight oil in your vehicle. If they did either of those things it can affect fuel mileage. linkfedilink
They probably put synthetic blend and/or the wrong weight oil in your vehicle. If they did either of those things it can affect fuel mileage.