No.
Yes, I use FP everytime I fill up
Yes, I save them until I have a larger amount to redeem
Fuel Perks? What are FuelPerks?
The gas station closest to my house is usually more expensive. Luckily, I drive past 6+ gas stations that accept them on my 40 mile drive to work so I use the gas buddy ap on my phone to see which place is the best. Usually, it's the same one.
Like others have said, the only one in my area that accepts fuel perks is a little bit out of the way and slightly higher- so I wait until I have a decent amount accrued before I use it. But shoot yeah I use it!