Engineering Explained - Engine oil and valve deposits

[StevieC]

Why couldn't they vent the PCV gases bubbling them up into the gas tank to mix with the fuel and be burn't by the injection system? I can't see even 1/4 cup of engine oil mixed with a full tank of fuel affecting anything.

Heck I used to pour a quart of transmission fluid into the gas tank as a lubricant for the fuel system way back when with 0 issues.

 

[CT8]

Originally Posted by StevieC
Why couldn't they vent the PCV gases bubbling them up into the gas tank to mix with the fuel and be burn't by the injection system? I can't see even 1/4 cup of engine oil mixed with a full tank of fuel affecting anything.

Heck I used to pour a quart of transmission fluid into the gas tank as a lubricant for the fuel system way back when with 0 issues.
The crank case blow by is a positive pressure it need to be vented into the atmosphere or recirculated back into the intake manifold to be reburned. Today's gas tanks are sealed from the atmosphere [ the evap cannisters etc.] Though venting the crankcase gasses to the gas tank would be an explosion hazard. You would be surprised at how foul the crank case gasses are.

 

[StevieC]

Maybe bubble them through some sort of water container then to capture it all and then vent to the atmosphere?

 

[CR94]

Originally Posted by StevieC
Why couldn't they vent the PCV gases bubbling them up into the gas tank to mix with the fuel and be burn't by the injection system? ...
The PCV gunk that now fouls DI intake valves would do wonders for your injectors, I bet.

 

[PimTac]

Originally Posted by StevieC
Maybe bubble them through some sort of water container then to capture it all and then vent to the atmosphere?




That might be difficult in freezing weather.

 

[StevieC]

I'm sure they could come up with a solution where some sort of anti-freeze like Alcohol was involved in the water.

 

[StevieC]

Originally Posted by CR94
Originally Posted by StevieC
Why couldn't they vent the PCV gases bubbling them up into the gas tank to mix with the fuel and be burn't by the injection system? ...
The PCV gunk that now fouls DI intake valves would do wonders for your injectors, I bet.



Even if it caught 1/4 cup of oil in say 15 gallons of gasoline it would be so heavily diluted it would be fine. If this were even feasible.

 

[StevieC]

I was actually thinking if you ran the PCV to a spin on filter adapter or to a Bypass type toilet-paper filter and then back again it might get soaked up by this media and would be not only easy and economical to replace but would also rectify the problem without venting to the atmosphere.