I am installing a Amsoil bypass filter and am planning on taking samples for oil analysis from the bypass filter return line which will run through the oil filler cap. I have seen in other posts where people recommend taking the sample from the pan or during an oil change mid dump. Is there problem with taking the sample post bypass filter instead of from the pan?

 

If I am reading correctly you will be taking a sample after it is filtered, should be a clean sample everytime.

 

Exactly. The question is, does this defeat the value of the oil analysis since the sample would have just passed through the bypass filter?

 

I would think that an analysis will still show all of the many different particualtes that would permiate into the oil at a molecualr level. Possibly the only value to be skewd would be the soot load in the oil. I take my samples from the return cap myself, and all my analysis except the last one looked legit compared to my usage on the oil for that particular interval. I did have a not so stellar analysis this last oilchange as I went too far on the interval as well as other things. JMO

 

You're fine, the oil is filtered, and make sure it is hot. I have a BMK-11 and that is what I do, even though I have a Fumoto valve. Easier.

 

woodrep & D-Roc thanks for the reply. Taking the analysis sample from the return line certainly seems like the easiest way to do it. I just wondered if Blackstone would be able to get an accurate measure of the engines condition after running the oil through a 2 micron filter.

 

This would be a good time to have a comparison of an oil anaysis pulled from the return cap location as well as the drain pan and then see if the results are dead on or not.

 

i installed a ball valve on the outlet side of the bypass. that is where i grab my oil sample. i use amsoil 15w-40 oil- i regularity get 20,000 miles per oil change- but my oil analysis says i could go longer

 

I don't know how much oil is needed for the sample, but I would think that using the oil that sits in the filter would be a prime spot to take the sample.

 

I wouldn't worry about that silicon reading yet. I would suggest at least running a stock drop-in or an AFE PG7 (I've had GREAT silicon readings with both) for 3000-5000 miles and taking a sample. If it drops greatly, it's likely that it was the filter. If it only goes down a little, then it's likely that the sealants (or abrasives) used in the remanufacturing process are still leaching into the oil.

Please post again with your results. I'm not convinced it's all the air filter's fault...