Got mine done at 2k this past Saturday, first thing the service guy said was "You don't need to do this till 5k" I was like "The manual said 2k" (am I correct on that guys?) Anyways, he was like "Ok, I guess" and we went ahead and did it, it was free with the rewards program anyways. He tells me every 5k to 7500k and not 10k as the manual suggests, how do you all feel about that? I mean, I know more frequent would be better, but is it neccasary to do so soon, rather than 10k, given the fact it is synth. Or synth blend for the time being atleast.