Interesting question

[WildBillyT]

For a buddy of mine at work.

Car is a BMW 3 series.

It has a small oil leak, and when you pull the dipstick out the idle gets about 25-50 RPM higher. When you put it back the idle drops back down.

What do you guys think? Maybe a pressurized crankcase due to a clogged PCV system?

[NJ Torque]

Could be PCV... or maybe a bad/cracked ring maybe?

[HardcoreZ28]

By oil leak do you mean consumption? Could be a bad intake manifold gasket causing an internal vac leak and pulling oil from the galley right into the intake runners.

[WildBillyT]

By oil leak do you mean consumption? Could be a bad intake manifold gasket causing an internal vac leak and pulling oil from the galley right into the intake runners.

Oil drips on the ground.

[69BirdX]

Pcv sounds logical. The extra pressure may be pushing out a gasket.
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[camaro2you]

It's defiantly something to do with the pressure Ive had problems with this before and it was either having to much ventilation or not enough.