I am looking for SRT-6 and found one. The dealership that has it is not Chrysler dealer and says that they don't have it's service history. It has 16K miles on it and carfax report shows first oil change done after first 1000 miles but nothing after that. Dealer says that engine is in good shape, so scheduled oil changes have to be done. What if I get it and will have some engine problems later. Is warranty still covering it even there is no evidence of scheduled oil change?