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Yes I too am sure that the high vacuum created by engine braking is pulling oil past the rings which is why I thought it was significant to mention in my posts. I wonder what long term effects this may have, maybe a shorter lifespan of the catalyst? This has been a neat thread but I am still not...

Thanks for heads ups regarding the oil consumption. I bet I could adjust my driving style, especially eliminate high RPM downshifts (with an impeccably timed double clutch and rev-match of course) and get my consumption down to 1 qt. for the OCI and probably half of that with a switch to 10w30...

Hi guys, Thanks for the feedback. Nothing above and beyond a normal oil change for the analyses. Pure1 was there for the duration. Oil consumption strikes me as normal enough, after a good warm up, I like to cane it a little! Lots of downshifting too, I still have 70% brake linings. I am...

Hi BITOG, Here's a sample from my 2002 Civic Si with 76,631 at the time of last analysis. (Previous analysis was Mobil 1, whatever was on the shelf in Fall '04) The oil looks like it did pretty well, this car has had Mobil 1 5w30 since 18k miles and Castrol GTX 5w30 before that for proper dino...