FWIW, I turned my seat on to one after about 45 minutes into the drive. It seemed to work great, a little warmth and to hot.
Tried it again, on the drive home from VT on Sunday same thing, after about 30 minutes, turned it on, it was nice.
226,000miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here