Oil Analysis Report

[Tadashi]

Here is my first oil analysis report with a factory fill oil. I changed to synthetic after this change. They detected abnormal amounts of silicon but still stated that it is still within a new engine parameters.

[tochatihu]

Thanks for posting the results. I have read that silicon in the early days can come from engine sealants, while later in life it indicates dirt getting past the air filter.

But just to play it safe, have you checked the air filter?

I have posted oil analyses previously and will look for those messages if you want to see the differences.

[Frank Hudon]

tochatihu could you re-post them, I remember a long time ago you posted them but can't seem to find them.
I'd look at the air filter and the sealing gasket around it as well. Also all connections from the air box and the resonator chamber under the air filter box to the throttle body. But also a lot of aluminum engines use high silicone content aluminum but my search on the 1NFZ engine doesn't mention this. But who's to know for sure with out consulting Toyota. If they'd tell you.

[DanMan32]

I agree with the silicone coming from the sealants. That was my thinking too.

[Bill Merchant]

[font=Comic Sans MS:b89233d646]Silica, silicon, silicone — let's try to keep these compounds distinct.[/font:b89233d646]

[DanMan32]

Thanks for the heads up, I never paid attention to the distinction.

[Tadashi]

I did not have my filter checked because the daler said that is should still be good for at least another 5k miles. When I get back from my business trip I will pull it out and check it.

[tochatihu]

I attach an excel spreadsheet of prius oil analyses. Not much metadata, but probably this is just to look at the averages. Mine were done at Blackstone, but not all of the others were.

On that Silicon terminology, I would also prefer to keep them all straight, but the different species are all reported the same by the analysts. The soil would be silica, the sealant silicone, the metal alloy additive silicon, and the form actually analyzed, probably atomic silicon stripped of several of its electrons. Assuming they are doing plasma spectroscopy.

[Frank Hudon]

partly my fault for the silicon/silicone with the alloy element. Sorry. For the years that GM made the Vega with the iron coated pistons and the hi-silicon alloy block they always had high readings on oil analysis tests

[Tadashi]

wow, my results seem much different (10 ppm SI vs my 220ppm). My tests were also done by Blackstone. I was not watching the tech also so not sure if he correctly did a midstream collection. I am doing the next oil change myself so will be able to ensure proper collection.