Handoogies

I've read in many places that changing the oil on a new porsche is recommended at around 2000miles, but track buddies of mine insist that its necessary at around 500 miles to change the oil in order to get the metal shavings that fell off a new engine out of the system. Anyone agree or care to comment?

ADias

I think that 500 miles is too early.

OCBen

That's what the oil filter is for. To filter out any metal particles and keep them trapped there until you replace the filter. And they're not "metal shavings" by any stretch. Just fine, nearly invisible particles. See this post to see what they look like:

https://rennlist.com/forums/997-foru...the-997-a.html

Fahrer

I doubt they are metal shavings but rather small metal particles ( dust like). I believe one of the reasons it is good to keep the engine below a certain rpm is to ensure that as much oil as possible is going through the oil filter (any particle that gets through the filter is something I would not worry about). At high rpms the oil bypasses the filter because dirty oil is better that no oil when reving the engine up. Keeping the enginge below 4000 rpm for 2000 miles would ensure that the amount of small metal particles circulating through the engine is minimized during break in.

Fahrer

OCBen... you beat me to it!

OCBen

That's interesting. Do you have a source for that information?

ADias

I see no mechanism in the oil circuits to do this. Where is your reference?

Edgy01

Years ago certain oil filter designs included sort of a pop off circuit that would allow oil to by pass the filter mechanism if it were filled and blocked, operating under the theory that some contaminated oil is better than starving an engine for oil. That was decades ago. The Porsche engines have never used that principle in their designs. I think Fahrer is an old guy, operating off ancient data. Misinformation is rampant on the internet. My best friend's brother's sister's boyfriend knows this guy....

Fahrer

Perhaps my information is old but how to deliver the required oil pressure and quantity demand at the extreme rpms? If all of the oil were filtered (100%, all of the time) then why are we discussing this? It would be a non-issue. No particles of concern would be recirculated through the engine and the number of larger particles should be reduced continuously and approach zero as you drive the car. Why do some of you find significant metal particles in your oil when changing? It is so noticeable I could see it in the photos posted! And these are "dry sump" systems.

Either your oil filtration system is not effective or it is being bypassed at times.

OCBen

Huh???

That's from the oil being poured out from the filter. The particles are trapped in the filter, as they should be.

Fahrer

OK , I understand... now, again, why is it an issue then?

uvgaal

Its not an issue. "the metal shavings that fell off a new engine" are you insane?

OCBen

You're right. It's not an issue. And that's what we were trying to get across to the OP.

I've suggested in the past that if anyone is concerned with these minuscule metal particles getting past the filter barrier once they are trapped (presuming the filter element is somehow defective) that they can just change the filter after 1000 miles if they want to for peace of mind. But the oil should be fine, and shouldn't need replacing until much later.

sharmat

Didn't we just have this coversation a few days ago?

Edgy01

Yes we did, but for some reason no one bothers to look back even 3 days to see if it's been discussed before they open Pandora's Box again and again.