Quote:
...For model year 2017, manufacturers recommended premium gasoline for 47.4% of new vehicle model configurations, according to the US Department of Energy (DOE). In model year 1985, premium fuel was recommended for only 6.5% of new vehicle model configurations.
The increased use of turbocharging and higher compression engines that require higher levels of octane contribute to this trend....
http://www.greencarcongress.com/2018/05/20180501-premium.html
...For model year 2017, manufacturers recommended premium gasoline for 47.4% of new vehicle model configurations, according to the US Department of Energy (DOE). In model year 1985, premium fuel was recommended for only 6.5% of new vehicle model configurations.
The increased use of turbocharging and higher compression engines that require higher levels of octane contribute to this trend....
http://www.greencarcongress.com/2018/05/20180501-premium.html