Hey how are you guys ? So last night I went and bought a 01 mustang gt with 112k in good shape. I test drove the car and all was great. The man was asking 4k and I explained to him that I was a wounded warrior and had to sell my 04 mach 1 before I deployed the last time and would really love to have another mustang. I asked him if he would take 3k as that was all I had and he said yes sir and thank you for your service. So I paid the man and drove off.....I got about 5 miles away and it started pinging very bad and had no power. I pulled into an autozone and used a scanner. The scanner showed a misfire on the #5 cylinder. So I bought a coil pack and after I installed it the problem was still there. I checked the oild and it was very tacky. What I believe he did was drain all the oild and fill it will either motor honey or lucas. I called the man and asked if he would take the car back and I would even let him keep $100 and he said tough luck it's sold now not my problem. Has anyone had this problem with there motor. It sounds like a ping in the bottom end. I do not have the money to put it in a shop, but need a car asap so any help would be great. I also live in Orange, Va if anyone lives close by.