We put our whole van on the card. We actually had a huge check from the ins. co. as our other van was totaled. My dh asked the dealer and they were fine with it but I think it had to be done in a couple transactions. My dh called and increased our credit line and said he was making a huge purchase etc.
They were charging us another kind of fee to get the used van we were buying ready. (dealer prep fee, I guess they do that around here) We just paid some of the cc fee the dealer was being charged so that was a wash as they erased the prep fee.
The dealer joked, what are you doing going on vacation with that. We said, kind of. We usually use our points for the Swan hotel.