Do a leakdown test to figure out if it's bad valves or broken pistons. Although the blow-by problem probably gives you the answer. I presume you're seeing oil on the "clean" side of the air filter and in the intake (air flap)?
Oil will get dirty in a hurry. You'll foul the O2 sensor and plugs, but compared to the real problem neither is a big deal.
Disconnect the hose that runs from the oil filler cap to the air box and route it under the car (longer hose), this will keep you from dumping oil back into the intake and plugging the air filter. With the engine running you'll probably see a lot of smoke from that hose.



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yey Vin 6507 