The question is pretty simple but I've had some issues wording it I'm not a car expert but I'm still curios about one thing - I've noticed that fuel (I use regular 87) from different companies sort of feels different. I usually fuel up only at 2 companies stations: BP and Road Ranger, but recently I was almoust out and fueled up at a different place next to local Walmart. 1st of all I was out of gas much faster than usual even though I put in slightly more that usual. Secondly the ride wasn't as smooth somehow. BP for me feels the best. Have any of you know anything about it? Why does it happen? Or I'm just seeing things and there's no difference?