Originally Posted By: 09rexwagon
Originally Posted By: ARCOgraphite
UOA's Funny! Cant tell much about PC oil with a UOA in short interval OCI's. If you think you can, your fooling yourself. I can tell vis from the drivers seat, and my under 5K OCI means never to worry about base depletion.
So the butt dyno can tell you the viscosity of the oil in the crankcase...interesting. How do you discriminate between varying air density from point a to point b, relative humidity, air temp, inconsistencies in fuel (even from same station, same pump, same grade). I'm fooling myself? Give me a break. You can tell the difference between 88whp and 88.2whp..sure.
If this car is such a problem that you are getting to this point with regards to oil, then you have a lemon or Toyota should be bankrupt. If your timing change tensioner is having problems on even 'low end' synthetic, why hasn't all the Yaris on the road been recalled?
I did not talk to any of these points you mention. And, Stay away from Starbucks ... ... Oh, Toyota is pretty good at hiding their engine problems - e.g. those thousands sludger Camry 4 cyls ... My boss had his Camry die at 58K with regular OCi of semi syn valvoline on short interval OCI