I used Sport Contact 2, standard equipped, for two sets. Didn't get 20k miles from either of the two sets. I then switched to a some other summer sets from Kumho(3 of 4 got sidewall blisters) and Sumitomo HTR ZIII(low miles and OK but not great traction) and was disappointed so I went to a set of Extreme Contact DW. Wasn't satisfied with them, lost traction often when cold and wet, and didn't get 20k miles as well. I am currently running a set of Pirelli P-Zero A/S Plus because they've been tested and rated higher than Conti DW and have a 40k warranty. I love the improvement in performance handling and hope to get the miles promised from them...plus, are more comfortable. The Pirelli's cost just $10/tire more than the Conti DW. I am now considering staying with Ultra High Performance All Season Tires year round on the Daily...and want to try a set of Michelin Pilot Sport A/S 3+, w/6 yr-45k mile warranty, next time but they aren't as nice a ride as the Pirelli are(per test result). I do live in Oregon and see wet and/or cool temps more often than temps a summer tire would need to be happy on.