Many owners hate the fact that they have to change the motor oil every 5,000 miles. Second reason is because of the convenience. You can’t have oil vapors having access to the atmosphere, so to deal with this they are then ingested and burned. Now why does the oem manufacture do this then and not just have a catch can? First reason is because of EPA standards. For those paying attention all four of those things make engine power go down. So to summarize that all up, it causes intercooler efficiency to go down, octane to go down, carbon buildup, and air density to go down.
Walnut blasting is starting to become a regular BIG MONEY maintenance item on cars and trucks now because of this. If you haven’t heard, manufactures are having a terrible time with carbon build up on the new direct injection motors that don’t have any intake port type injection to help clean out the carbon. Another negative is that this injected oil causes terrible carbon build up on the intake path wrecking havoc on the valves and piston tops. Another negative for those running intercoolers is that when the lines are connected in a way that pulls vacuum pre-turbo, which most OEM manufacturers do, than the oil vapor will coat the inside of the intercooler causing the efficiency to go down as it effects the intercoolers ability to transfer heat out of the intake air. Also the oil does not contain the BTU rating of gasoline, ethanol, methanol or whatever we are currently running for fuel, so the air density that it is now being taken up means less air that we can put into the engine for us to match with a good air/fuel mixture and make power.
This vaporized oil will essentially be lowering our octane level in its combustion. The bad part of this is that oil has an extremely low octane level.