I just traded in my old Honda for a '12 WRX with about 75,000 miles on it. Luckily I bought the biggest, baddest warranty I could from the Toyota dealership that had it for sale.
After driving it around conservatively for about ~200 miles I decided to really get on it on a highway ramp and heard a "whooshing" sound that I've never heard in any turbo car before.
The Toyota dealer claimed that the car had "undergone a 140 point inspection" and was 100% caught up on maintenance and "100% stock". I quit believing that the second I got a look at the air filter. It looked like it had been gummed up with tree sap and road tar or something. I also thought the car was louder than stock so I jacked it up and did an oil and oil filter change. The oil didn't look excessively dark. The exhaust definitely did not look stock. The mufflers were removed but it looked like the cat and the resonator were still intact.
Even with the air filter replaced the whooshing sound didn't go away so I took it to my local Subaru dealer.
I had them inspect everything and they found that, besides the exhaust, I also had a performance clutch and a short-shift kit installed by the previous owner .
The downside was that they found a oil on the hose leading away from the intercooler leading them to believe that the turbo is passing on oil through the intercooler - most likely meaning I had a leaking seal and would require the turbo to be replaced. The hose clamp was essentially spinning freely from the oil. They think the sound I'm hearing is boost leak.
I invoked my warranty and the Subaru dealer is going to do the work in a week and a half.
My question is:
Is it actually safe to be driving around in this condition? The Subaru dealer didn't make it seem like a big deal at all. At the least I'm pumping oil into my intake, at most I could blow my turbo, right? If I break the turbo and send bits of metal through the entire engine...
I'm already driving very softly (trying to keep it under 3500RPM) but should I quit driving it altogether until fixed? Once the new turbo is in is there anything I can do to flush the intake out or will it just suck everything through and sort itself out? Anyone have anything like this happen to them before?