Check the sig - not a single problem with the motor. I drive mine every day, take long highway trips in the heat of summer (at 22 - 24 mpg), do short 1 mile drives to work (never over 3000 RPM when motor is cold), and drag race it every chance I can up to stock SVT redline (withdrawl has set in, I can't wait until March 8). Heck, I even used it for deliveries one day when the NAPA Rangers were getting stuck in snow.
It pretty much sees all the possible conditions a motor can see (good and bad). Just gotta make sure maintanence is kept up, like any motor. DMD (Dual Mode Damper) doesn't hurt either.
