Here is my story. When i first got mine, car didnt use much oil at all. As power increases it started using more. at first compression test, there was 4psi difference. After header installed, compression test had 7psi diff, leak down test showed 7% varience. After I put GT2871, compresstion test still showed 7psi diff. After I install HKS ssqv, the boost was holding at 1.5bar not backing down, after a day I notice smoke from breather.

If I get the car tuned after putting ssqv, the engine may last a bit longer tbh. Mine situation is similar to Brett's, no tuning after VE is altered.....

Until the engine is removed, there wasnt any smoke from exhaust, no abnormal sound, just smoke from filler cap. Even after Mao took the engine out, there is only two hairline crack on piston 4 and rod bearing wear, ringland still intact, no scoring on the bore. That cracks made up 70 psi compression loss.......

But yes, leak down test gives more accurate result.

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport