gti pre delivery requests

[wai]

In all honesty, if you have been running an engine for 3-4 days (or even 10 hours) with foreign body contamination and it has not been trapped by the filter, changing the oil is going to do very little. Whatever damage the foreign bodies were going to do have already been done. After all, the only part of the engine that would be exposed to any foreign material is the oil pump, and it will have been churning through the stuff for 3-4 days anyway. Hopefully it will have delivered the bodies to the filter where they will have become trapped and rendered harmless and would not be revealed when the oil was dropped.

If it gives you some peace of mind, then by all means change it. It is unlikely it would make any difference at all.

[johnnie5]

In all honesty, if you have been running an engine for 3-4 days (or even 10 hours) with foreign body contamination and it has not been trapped by the filter, changing the oil is going to do very little. Whatever damage the foreign bodies were going to do have already been done. After all, the only part of the engine that would be exposed to any foreign material is the oil pump, and it will have been churning through the stuff for 3-4 days anyway. Hopefully it will have delivered the bodies to the filter where they will have become trapped and rendered harmless and would not be revealed when the oil was dropped.

If it gives you some peace of mind, then by all means change it. It is unlikely it would make any difference at all.

let me throw the cat among the pidgeons

Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power

each new vehicle i have had i have dumped the oil once it got home and you would be amazed at how much small metal flake is in the oil , you can see it but its too small to be filtered out

i have also used aftermarket filters and never had a vehicle in the dealer again unless its been a warranty issue so i am way way way in front of potential warranty issues

[wai]

each new vehicle i have had i have dumped the oil once it got home and you would be amazed at how much small metal flake is in the oil , you can see it but its too small to be filtered out

The reason you see these in the oil is because they don't make their way to the filter. They stay in the sump. Very small particles make no difference at all, provided the oil supply is OK. As long as the particles are smaller than the bearing clearance, any particle in the oil will simply pass through. As for parts in contact, they are already in contact.

In the past cars used to have magnetic sump plugs, however they fell out of favour because in the DIY era, owners used to almost have heart attacks when they saw this little tree of filings attracted to the magnet on the sump plug. The magnets were dropped. There was no sudden increase in engine failures, or filters getting clogged, but owners no longer felt like something was wrong with their pride and joy.

Engines are mechanical components, and there are many surfaces that are in direct contact, and you will get particles generated. This is perfectly normal, and is why you have filters. The filters will filter out particles that have been picked up by the oil pump and not allow them to circulate through the engine.

[johnnie5]

how can particles just stay in the sump ?

if there is particles in the oil they either get caught by the oil filter or they are too small for the filter to catch

either way metal particles in oil isnt good no matter their size

regarding sump plugs, yes what you say has some merit , but as well with the advent of alloy engines , alloy isnt magnetic

[brad]

how can particles just stay in the sump ?

if there is particles in the oil they either get caught by the oil filter or they are too small for the filter to catch

either way metal particles in oil isnt good no matter their size

regarding sump plugs, yes what you say has some merit , but as well with the advent of alloy engines , alloy isnt magnetic

Gears, cranks, con-rods, cams, etc are. EA888 in the Golf is still 32kg of iron block. The Polo is an EA111 iron block isn't it?

I agree with Wai. The particles either stay in the sump, get caught by the filter or are so small that they are inconsequential. We're talking family shopping trolleys, not balanced & blueprinted F1 engines.

[gavs]

Plus the fact that these engines are actually pre-installation run-in and have their oil changed out, inpected, engine into sub-frame, installed into car and re-filled.

The motor-man article is what I followed and yes, i found some grit in my oil when changed out at 6000kms but changing after 3-4 days seems, well, a little too precautious.

And yes, they will know because the sump plug has a different head from the factory vs the replacement part. You can re-use the original but there is a reason they use an Aluminium crush washer on them....

[johnnie5]

I agree with Wai. The particles either stay in the sump, get caught by the filter or are so small that they are inconsequential. We're talking family shopping trolleys, not balanced & blueprinted F1 engines.

F1 doesnt matter since they get a rebuild every race

metal particles in oil arent a good thing

the whole point of the discussion is

is it better to have metal particles in your oil or not ?

planning on long term ownership then for me early oil change

[brad]

Sorry, keep forgetting I'm not qualified & have no knowledge of this stuff. Carry on with the motherhood statements.