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Here is UOA. Fuel dilution is kinda expected since this car is DI and is used for short trips somewhat often and sits often. Also had a weak vaccum pump Unless somebody tells me otherwise, probably not a big deal.

I mean it gotta be minimal amount right? Since it is like a good 2 inch shorter, unfiltered oil is gonna hit both side of the oil filter. Does't that wash off whatever it is trapping? The oil filter is bascially just soaking in a box? Is my understand incorrect?

The oil filter looks pristine. (well if oil is bypassing it... it gotta be looking pristine...). I still got the oil, I can run some through like a coffee filter and see what shows up.

I agree with what you said. But I am not performing some scientific study though, I am just trying to seek action from the shop. If the used oil analysis show significant enough discrepancy between it and the national average, I can probably convince the shop to act. Like more testing (if high...

There is abosulty no doubt about that, cleaner oil is always better... But how much better is what I really wanna know (in another word, how much extra damage did I get)

1. I don't care about the particulate count. I only care about engine wear. From what I read, only a small portion of particulates in engine oil are actual engine wear. Most is combustion residue. These comustion residue would otherwise be filtered by the oil filter won't be filtered in my case...

Sorry, I thought you are talking about figure 11. I think my point is figure 13 and figure 12 are from two different studies and they can't be cross referenced. Study in figure 13 did not do a used oil analysis.

True, but field study, in most cases, is much more closer to a "real world condition".

If there is elevated wear. (piston ring, bearing etc).

This paper is citing two different studies. One is for a field study. One is for a lab testing (which they added a ridiculous amount of junk in the engine). This graph is from the field study where the graph ZeeOsix quoted is from the lab testing, I personally do not think the lab testing...

Thanks for the paper linked. "DIESEL COMPONENT WEAR TEST - Aninvestigation into the relationshipbetween lube oil filtration and rates ofabrasive wear in diesel engines wasperformed by the AC Delco Division ofGeneral Motors(21). Wear of fivecritical component areas in a DDA 6V-53Tengine were...

I still have filter, kept as evidence. It is a different part number and it is made right… for that part number.

Make sense, thanks for the tip.

luckily I got it in a brand new catch pan.

Yeah they are apologetic about it. They also said the technician that did the job 1 year ago no longer work there for another reason and would probably get fired again for this. But I don't know what else they could offer me, since the damage is done and probably long term and won't show up in...

I do still have the old oil (kept it as evidence lol), yeah I will send a sample in to blackstone.

It is a Porsche 981. So... not really the most reliable car there is with probably tight tolerances. It also has alusil block... I saved a long time for this, so it really sucks that someone messed it up on the first oil change in my ownership. Either way it is DIY for me from now on...

I did my own oil change this weekend and the oil filter I pulled out is the wrong one. I did my last oil change in a supposedly reputable local shop. It is too short (made for previous generation car), and since it is a cartridge style filter, it isn't sealing against the engine, bascially means...