Hi all,
To start off, here is a build list of my newly installed turbo kit as of 4/26/2025:
2000 Miata with BP4W
Flat top intake
Flowforce 640cc injectors
Stock coils
NGK BKR6EIX plugs gapped to 0.028"
USED Kraken low mount turbo kit
Garrett GT2554R turbo
3" downpipe reduced to 2.5" flange, 2.5" roadstersport catted & resonated midpipe, Racing Beat 2.25" muffler
Let me know if you have additional questions about my build

Basically, I found oil in my charge piping coming off the turbo. I noticed it because the silicone hose connecting the first pipe blew off. It was bad enough to where it coated the pipe that goes down to the intercooler, and my subframe on my hotside aea had a film of oil, enough to drip and make a small spot on the ground. I will say, before the hose blew off I was driving the car for a street tune. No pulls, just holding the car at 2k-4kRPM in 500RPM increments as the tuner dialed in cruise cells. I'm when the hose blew off, but it happened before I started doing my first pull (got zero boost), so hopefully I didn't overspin the turbo and ruin the sealing rings by doing that. I also fixed the oil you see at the turbo 3 bolt flange by tightening that crappy allen bolt a bit more with pliers.




None of my intercooler hoses are kinked, and I don't think my exhaust is a restriction. I checked the PCV and hotside valve cover vent hoses (I just replaced them before I turbo'd the car) and they were clean. I also checked the throttle body hose, and it was dry so at least nothing made it to my intake. The oil return line is built from a 10AN CPE kit from Evil Energy:




You can't see it in the pictures below, but here is how my drain hose comes down. There's a 45deg fitting on the turbo drain angled toward the front of the engine, and it slopes down to the oil drain fitting you see here, which is 90deg. The entire run is extremely short. Does it look like it allows for a good oil return path? Sorry for the crappy photos but there's no room to get a phone in there. Don't mind the oil, I loosened the fitting to see if trying to angle it higher would help (it didn't, or at least not much).




I recirculated the hotside vent to my intake pipe and the intake pipe was clean too. I'm really bummed out, as this was the toughest project I've ever done outside of an engine swap (which was extremely draining too) and now I have to rip everything I did apart to replace or at least rebuild the turbo, which is a ton of $$$. What I'm asking here is, would there be any reason other than a blown turbo that's letting oil get into my charge piping? Is there anything else I could look into before to confirm the cause of this before I remove everything?

In case it is a blown turbo, what's a good rebuild kit out there, or CHRA cartridge? Is it an easy job once the turbo is off the car?