On Mar 31, 8:02*pm, Jim Yanik wrote:
Hell Toupee wrote :

So why not use the summer blend year-round? The main reason apart from
the fact that the 1990 law isn't written that way is that summer-blend
gas doesn't work as well in the winter. Summer blend's low-evaporation
rate makes engines less likely to stall in hot weather but can make
them difficult to start in the cold...

I wonder if that vapor pressure change really matters when most all cars
use multiport fuel injection these days?


Pretty much all gas nowadays doesn't act the same as gasoline of the
days of yore did in a carbureted engine anyway.

nate