Can my 2015 ford truck escape use flex gasoline?

Can flex gasoline be used in 2015 ford truck escape

Yes.

What does the owners manual say? What does the gas cap say?

Hi only if it has a gasoline engine.

Why is it so difficult to go into the glovebox, and opening up the owner's manual and READING IT?!

On the back of the vehicle OR on the side badges, does it have a green leaf symbol that says.//
"Flex Fuel"? If it does, then it can. If it doesn't then maybe it can't. It's so new, you could call the dealership or the salesman.

It's not called "flex gasoline" it's called E85. And only if your vehicle is designated as a flex fuel compatible vehicle.

No such thing as flex gasoline

1. The Escape is a unibody CUV. It's not truck, it's built on the same chassis/platform as the Focus.

2. There's nothing called "Flex gasoline": Perhaps you're referring to E-85. Which is 15% gasoline and 85% Ethanol. "Flex Fuel" vehicles can run on E85. Your Escape is not a flex fuel vehicle.

3. Per your owner's manual
"Choosing the Right Fuel

Use only UNLEADED gasoline or UNLEADED gasoline blended with a maximum of 15% ethanol in your gasoline vehicle. If your vehicle is a Flex Fuel Vehicle (FFV), it will have a yellow bezel placed over the fuel fill inlet.

Do not use:
-Fuels containing more than 15% ethanol or E-85 fuel.
-Fuels containing methanol.
-Fuels containing metallic based additives, including manganese-based compounds.
-Fuels containing the octane booster additive, methylcyclopentadienyl manganese tricarbonyl (MMT).
-Leaded-fuel (The use of leaded fuel is prohibited by law)."

You can't use E85 in this vehicle