I use the plastic gloves if station provides them, I generally have some in my trunk if they don't and if the handle is clean I will still at least use a paper towel if available. I don't want diesel on my steering wheel, they are expensive.
I'm 6'5" and 300 lbs and no one has ever dared to call me wussy for using a glove or paper towel at the station.

Sometimes I have seen guy who looked like he wanted to, but in MO everyone can have a consealed gun in the car.

Not to mention sometimes my CCW prints, or a shirt rides up too far.