Upon startup one (to leave for a restaurant) it puffed a bunch of blue smoke. Upon startup two it didn't, when I put my foot into it a little it still did not. Although when checking there was a black oil like substance that came off on my finger from the inside of the exhaust pipe. Now we were told that it could possibly be the early stages of oil pressure seals rupturing? But could it be worse? Or is it something small? No codes are on the dash. Also pressure is running at 360kpa? Is this normal?