Don't know what's going on running 93 octane in my 36 gal tank and when I usually fill up it says 550 to 600 miles to empty, here lately after filling up reading 380 to 400 miles to empty. Using good gas station chevron and BP does anyone
have an ideal what's going on ? Using 93 tune don't think that has anything to do with it

 

Little help guys

 

Before ya let that throw ya, have you actually calculated your mileage?

 

Why are you using 93 octane? What is your engine, comp ratio,etc?

 

Winter blend fuel is always worse quality than any other time of year. I always see a decrease when winter time is here.

 

x2

 

Think he has a programmer set to level 3 which requires 91+

 

And dont forget,since it is getting cooler the engine will compensate and stay in warm up mode longer until it is at operating tempature, I dont think it takes much, but when you consider its every time you start your truck, it has to do this, it adds up to more fuel and less fuel economy.
And that winter blended gas sure doesnt help either. l take a hit in fuel economy every fall until it warms up again.

 

Using 93 tune from 5star

 

Since maybe gas no good I should go back to running 87 tune and use 87 oct through the winter months