Subaru 2.5L 40k; Mobil EP 0W-20 6.8k

[ford250]

Awesome.

Just curious because I don’t know
With the filtration ability of the Fram Ultra filter is it possible for it to remove the silicon or is it just to small of a particle to trap in an oil filter ?

 

[kschachn]

Just curious because I don’t know
With the filtration ability of the Fram Ultra filter is it possible for it to remove the silicon or is it just too small of a particle to trap in an oil filter ?

It may sound obvious but the filter will not remove anything that’s showing up on a UOA. Yes it’s far too small. For the most part a UOA shows elements in solution, not particles.

 

[ford250]

It may sound obvious but the filter will not remove anything that’s showing up on a UOA. Yes it’s far too small. For the most part a UOA shows elements in solution, not particles.

Okay
Then please explain what the oil filter is trapping and filtering out of the oil.
If silicon is an outside contaminate due to a faulty air filter seal or whatever that inters into the crankcase mixed with oil. Why wouldn’t a UOA show that ?
Thanks in advance for the info

 

[kschachn]

The filter will trap down to the absolute minimum value, whatever that happens to be. But an ICP will clog the inlet way below that value. ICP measures elements in solution, not particles. Particles are bad for the ICP plasma and are filtered out by the machine.

You still measure Si but it’s (obviously) not what’s being trapped by the oil filter. There’s a gap in sizes between what is trapped and what appears on the analysis, you’ll have particles in the oil that are neither trapped nor appear on the UOA.

FWIW this is for all elements not just silicon.