I did a compression test on my ebony 03. Not really sure why i did just bored i guess but my numbers are very low compared to what ive seen some guys say there getting. Cylnders 1-5 were 140psi with 6-8 being 130psi. I bought this car back in 10/2019. I bought it with 3,207 miles on it. Ive put 150 miles on it. No i didnt do nor did i have a compression test done prior to buying. I figured with only 3,200 miles on it should be tip top. I had it dynoed and it made 380 hp and 445 tq at 5400 ft on mustang dyno. I live at 7500 ft above sea level, would elevation affect my compression test this much??? I pulled fuel pump fuse and held throttle wide open. Engine was cold and i did it 1 plug at a time. any suggestions on where to go from here would be great.