I run whatever comes out of the pump at whatever station I'm at. Cars, snowmobiles, snowblower, lawn tractor, chainsaw, etc. The only issue I think I've ever had was I just had to replace the fuel lines on my 90's John Deere weedwacker. But its 20+ years old and the replacement fuel kit was $13 so I'm not concerned.
Marauder always gets filled at a Mobil or Sunoco however.
What justbob said: Engines and fuel systems have been designed/built radically different the last few decades. Engineers have been working around this for years. No company wants the reputation of their products failing during normal use and Ethanol is the new normal.
2004 Silver Birch w/moonroof. "Isabelle"
Eaton swapped summer/fall 2015 with all the gooddies, tune by the one-and-only Marty-O +2psi pulley, Steigemeyer stage 6 port, SWLT, custom ss exhaust, Borla ProXS, Addco sway bars, TCE s/s brake hoses, Hawk HPS pads, Zack big brak kit, J-mod, battery in trunk, full custom audio (never used, blower whine sounds better)
To do list:
HID headlights, LED interior/exterior, courtesy "3-flash" turn signals, widen wheels, rear deck wing, marauder stencil on cmhsl? bumper cover inserts? deck lid, steering whee, hood liner godshead, more power!