what's the point of midgrade gas?

[nakedfrog]

Originally posted by: waggy

Originally posted by: bobsmith1492
I get midgrade; my truck gets slightly better mileage on it than on regular so I use it. It's essentially the same price, so why not? With regular at 3.09, midgrade is only 3.2% more expensive - a dollar or two per fill-up.

in some areas the midgrade is the same price or cheaper then the low grade. so i get the midgrade

Around here the 89 octane is E10, with the corresponding ~10% loss in MPG, so I stick with 87 in everything but the turbo (which gets 91, natch).

 

[heymrdj]

Originally posted by: compman25

Originally posted by: heymrdj
My 04 Expedition with the 5.4L is supposed to be smart and run well on 87. It does...BUT, after 8 full tanks of 87, it's definitely lost power, and i can't get it's mpg over 16.4 cruising, on 89 I could see 17.2-17.5, and as much as 19.8 on the interstate. I'm going to run some injector cleaner through it soon, this 87 stuff is horrible for the motor.

If you're buying your 87 and 89 from the same station then the 87 isn't clogging your injectors. They have the same additives.

Yeah it's form the station. Running 87 I've also lost about 1mpg, more noticeable on the highway where it shows a loss of about 2.5mpg. The truck is also hitting higher power bands, hitting 5.2kRPM at 80mph when gunning it, when it wouldn't go over 4.5k RPM on 89 and 93.

 

[Howard]

Originally posted by: Throckmorton
Guys, stop calling it "premium", "mid grade", "low grade" etc. You are playing into the marketing. The only difference between the gasses are the amount of octane modifier they put in. None is better than the others.

Octane modifier? You mean octane content?