I disagree with wasting money. I will run 91 shell for a bit here and there, and been testing mileage vs price. in tracking mileage I typically break even or get better mileage. What I do gain regardless is that the engine runs much better and definitely more responsive. Part of that is supposedly due to it not having ethonal in it.
The beatings will continue until attitudes improve!
HID Quad bi-xenon + foglight retrofit