I do flinch and therefore don't buy pricey rims, euro lights, tires, stereos, etc...
I am at piece of mind knowing that my autos are more than capable running on a lower octane without any damage whatsoever to any components.
That's not to say that there are some crappy blends without any detergents. Do your due-diligence.
The auto companies spend lots of $$$ to get .25 - .5 mpg more out of a car. By requiring the buyer to use high octane is a freebie for them.
'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)