1993 Chevy Suburban Gas mileage?

[xprettyinpinkx]

I have a 1993 Chevy Suburban and am going to California. I believe it has a 42 gallon tank and gets 16-18 mpg on the highway. I filled up 35 gallons worth today with SUPREME fuel. I need to find someone has the same vehicle or just knows vehicles pretty well.

I'm wondering--How many miles will I go until I'm completely out?

 

[VanGo]

figure 16 X 42 = 672 miles

You are wasting money buying anything but regular 87 octane gas. That's what they were designed for. If it doesn't run right on 87 you have a problem that needs to be fixed. It may also be affecting your mileage.