Hmmm, as a super commuter (180 miles a day) who has worn out a set of OEM tires on my 2012 and a set of Continental ProContact's (w/Ecoplus) I can say with assurance that I did get better mileage/range from the Conti's, better handling, and quieter performance. Not to mention the increased durability/damage resistance a bit of extra rubber adds to the mix - that and the fact that the OEM's went 53K miles before needing replacement and I replaced the Conti's after they had gone 93K miles (Yeah, add it up - I've got well over 150K on my car - not a record but certainly enough to speak to this issue). The only downside to the ProContact's is that they are no longer available <Sigh>. Their replacement, the TrueContact, gets a very high rating from Tire Rack (best in it's category) and it lives up to it in all respects except electrical range - I'm down about 2-4 miles per charge at this point, but the tires are still new and wearing in (plus we've had a good bit of wind to fight recently) so we'll see how they perform after a few thousand miles.Even the conticontact pro cotton mouth blah blah blah ecopro etc tires aren't any better in the real world
and everything else results in range loss.
Zero issues with my OEM assurance tires. Zero.For efficiency/economy it seems like Chevy actually did some research before settling on the Goodyear Assurance Fuel Max OEM tires.
But don't get me started on puncture resistance or the apparent lack thereof 'cause since I got the car in December I've patched the tires more than anything other than my Jeep and the Jeep gets a pass due to all the offroad running.