Why exactly do gas stations offer mid grade gas, like 89? Most non performance cars out there will use 87 octane. High performance cars will use 91 or 93. So where exactly does the mid level 89 come in at?

 

Purpose?



Indecision.

 

The budget high performance car? Aka a mid-performance car?

 

For my truck. It used 87 octane when new, but because it has 460,000 miles, it detonates going up hills on 87.

 

Gas stations only have 1 tank underground, it doesn't matter what button your push it's the same gas.

















am I kidding???

 

They have two, and expensive blending pumps. If your car is rated for 87, they might as well have one tank though, for all the good it will do you to buy premium.

 

Never buy it. If you must, make your own.

Example:

87 octane is $3.00 a gallon. Midgrade is $3.10, and premium is $3.20. Well usually midgrade is 89 octane, but premium is 93 octane, rather than 91. So if you get a tank of midgrade, you're spending $3.10 for 89 octane. But if you put in half regular, and half premium, your average cost would still be $3.10, but you'd be getting 90 octane, rather than 89!

Midgrade - waste of your money.

 

Here, we have 87, 89 and 91. Also, the price doesn't go up $.10 per grade. It's more like $3.64, $3.76, and $3.94 here.

 

Hmm, that's interesting. Most times I've seen them at consistent price differentials, but it is a toss up of 91 vs 93. Most everything around norther AL is 93.

 

Why are we even talking about this? 95% of the cars on this forum should be running 87. Anything else is just a waste