Ok, guys! Need some professional input/opinions. Got a 1997 Ford F150 5.4 Triton V8, somewhere around 150k miles all original. Not my truck. Burns oil like crazy smoking blue smoke out the tail pipe. Just had a tune up (done by someone else) I was told it wasnt smoking like this until it came back from a 6 hour road trip both directions. The oil was almost completely gone, barely registered on dipstick, topped it off and it smoked even more. No visible leaks. Check engine light also occasionally flashes. Also idles very poorly, misfires and wants to stall out. It's throwing the following codes:
P0174
P0136
P1131
P1151
P0302
P0171
Everything seems to me like the piston rings are worn badly, and the 6 hour road trips just finished them off. 02 sensor codes could be caused by oil coating the sensors, misfire from oil in combustion chamber, oil could be clogging the catalytic converter. Just wanted to run it by some seasoned mechanics to see what y'all think. It doesn't overheat either. Thanks guys!
Read more: Burning oil, worn rings?
