Additionally, I drive 28 miles round trip to and from work 5 days a week using city streets, no freeway driving. My car has shown 30.2 miles per gallon everyday. I stay within the speed limits but I don’t drive like a snail. Mine is a 2018 Touring.I filled up with 89 octane last week as the 87 handle was broken at the gas station I was at. I noticed no difference in the running of the engine or gas mileage.