We’re entering the fourteenth year of production for Ford’s 5.0L Coyote V8 engine, and in that time the Coyote has made a name for itself. It’s a powerful, throaty engine that’s been in the Mustang GT since the 2011 model year. Since its inception, the folks at Ford have managed to squeeze an extra 68 horsepower out of the Coyote with the new 2024 Mustang GT boasting 480 horsepower. Despite these gains, one issue the Coyote has had for years still persists—excessive blow-by.
What is Blow-by?
If you’re not familiar, blow-by is a result of high pressure on the top side of the piston pushing combustion gasses, as well as droplets of oil and fuel, past the piston rings and into the crankcase. To prevent excessive pressure in the crankcase, most modern vehicles extract blow-by via the PCV system and route it back into the intake. While most manufacturers add an air-oil separator to the PCV system, they often aren't as effective at removing oil as we might like. This leads to the problem of oil







