Download Do Bmw 3 Series Need Premium Gas Background. I think it's above 91. It used to be very easy to figure out what grade fuel your car will run best on, back in the days before knock sensors.
You only have to put premium gas in a car which recommends premium gas.
Find a fuel efficient vehicle that meets your needs. If someone asks why i use premium gas, what should my answer be? I have a gas station at home that has 91 octane but is ethanol free. Drivers from chicago to park ridge are gravitating toward the impressive 2020 bmw 5 series.
