Originally Posted by jwikoff99
I was at a Clark station last night that had 5 grades of gasoline.
87 89 90 91 91.
Wow! That brings back memories of the 60'* and 70'* when Sunoco produced 7 grades of leaded gasolines starting with Sunoco 190 with around 89 octane to the fabled Sunoco 260 that produced over 98 octane(I think they skipped Sunoco 250). Back then Sunoco 190 could not run effectively even in a VW Beetle(REAL Poor Mans Gas). The only cars that could use the power of Sunoco 260 were the big block Corvettes, Chrysler Hemi'*, GTO'*, et al.