Originally Posted by CR94
Originally Posted by JAG
I still have not figured it out. Sometimes changing chemistry and increasing viscosity (HTHS viscosity) can cause drastically increased oil consumption. ...
Well, there's the hypothesis that high viscosity oil combined with low-tension rings can lead to excessively thick oil film remaining on cylinder walls when the piston descends. (I've read that, but don't know how often it actually occurs, if ever.)
Something about the rings "skipping" over the thicker oil. It was an interesting subject and totally opposite of what I would have guessed! don't remember the details.
iirc Shannow was the one posting about the "skip" concept. Not sure if he was explaining it or said he had read about it or what!
Originally Posted by JAG
I still have not figured it out. Sometimes changing chemistry and increasing viscosity (HTHS viscosity) can cause drastically increased oil consumption. ...
Well, there's the hypothesis that high viscosity oil combined with low-tension rings can lead to excessively thick oil film remaining on cylinder walls when the piston descends. (I've read that, but don't know how often it actually occurs, if ever.)
Something about the rings "skipping" over the thicker oil. It was an interesting subject and totally opposite of what I would have guessed! don't remember the details.
iirc Shannow was the one posting about the "skip" concept. Not sure if he was explaining it or said he had read about it or what!