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Old 10-18-2023, 11:21 PM   #9 (permalink)
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Join Date: Dec 2010
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Sport Utility Prius - '10 Toyota Prius II
90 day: 52.98 mpg (US)

300k Sequoia 4WD - '01 Toyota Sequoia Limited 4wd
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Originally Posted by ademonrower View Post
I don't know in quantitative terms yet, because I've only driven around 200 km (120 miles) so far, but I can see a little oil starting to collect. The qualitative test - and I have (my wife tells me) a very good sense of smell :-) - is that I can hardly smell the exhaust anymore. I have tuned my carburettor very finely, so hardly any gasoline smell: it was basically just a little oil getting burned. I suspect that in older cars (mine is from 1979) the combination of slightly more piston blow-by and less efficient PCV in general produces more crankcase gas. That said, the Volvo redblock engines - cast iron block - wear very well (it's not rare to see the diamond honing on the cylinder walls still almost factory-perfect after 500,000 km!). My bottom line is that my particular modification worked well for my particular car. That might be luck, and at the most it's an experiment with n=1 :-)
Thank you also for alerting me to a potential caveat: particularly in winter, you don't want simply to tip the collected liquid back into the engine: it might well contain lots of water and even be an emulsion... hmmm... in general I think it's probably a good idea to check the liquid anyway... and probably just tip it into a used oil container... probably does more harm than good to recycle it... ?
Yeah for the most part unless its burn consistently as vapor its probably best to just dump it out.
Big turbo cars can have a lot of blow by and then it really is mostly oil getting pushed in.
"I feel like the bad decisions come into play when you trade too much of your time for money paying for things you can't really afford."
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