Haven't tested compression or performed leak-down yet, and I do believe I'm burning oil, to the tune of 1-1.5 qts in the previous oil change (I think that's right, went from the top/full line to the bottom "safe" line in 4100 miles, and I didn't add any make-up oil). Considering I just got this info, I'm in the process of pooling money so I can get this stuff done....