Originally Posted by
jimmy d
Spain: 95 RON "Euro" is sold in every station with 98 RON "Super" being offered in most stations. Many stations around cities and highways offer other high-octane "premium" brands.
Are European cars running higher compression ratios than the U.S.? What's the benefit of the higher octane blends given that octane yields less energy per given volume than heptane? Emissions?