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Bump. Wanted to mention the friend that has the '07 did the treatment with B-9 and a 24 hour soak. His oil burn went from >1 qt/400 mile to < 1/4 qt per 500 mile. This is with mostly highway driving - little start/stop of the engine since they're rural. He would top the oil off every two days...

Correction: "All years of the Prius had oil usage problems." It's the nature of the beast. When you start/stop an an engine 20-50 times a drive vs. once, things get wonky. My solution to the oil color issue was to not change it for 40,000 miles. I added about 20 qts of oil as needed...

Originally Posted by JRed Originally Posted by D1dad Maybe that was my problem with mine. I try and baby my cars while my wife drives like she's gotta poop. I did one last 1k mile run with maxlife 0-20 (car calls for 5-30) and 16 ounces of kreen and beat the daylights out of it. I changed the...

Originally Posted by JRed Going to call this a success. Oil is staying cleaner and burning has been greatly reduced - so little that I'm not going to bother adding oil. 1100 miles and I would guess less than 1/4 quart of oil burned. This is awesome. A friend has one that guzzles oil at 280K...

Originally Posted by JRed Few more miles. Intake plenum has some "stuff" in it already. I'm not sure I remember it accumulating so fast before, but in theory it might have -- the 1NZ-FXE pushes some of the intake charge back into the plenum. In any case, it hasn't burnt a noticeable amount of...