Does overfilling matter if a car is deleted?

[privateTDIjet]

What the title says. I usually overfill because of the stupid dipstick design but Ive been wondering if it even matters once a car is deleted. Of course, not grotesquely overfilling to the point that it touches the crankshaft but you know what I mean.

 

[Sting]

Not sure how much it applies to later TDIs, but on the ALH you can go about a 1/4" up the dipstick past the bend. YMMV.

 

[vol4til3]

nearly destroyed my crackshaft from overfilling.

 

[ZippyNH]

You do typically loose HP on cars as the oil gets foamy and have a drop in pressure.....
Dyno tests shows this regularly....it more than just about oil use.

 

[Tuheeden]

What the title says. I usually overfill because of the stupid dipstick design but Ive been wondering if it even matters once a car is deleted. Of course, not grotesquely overfilling to the point that it touches the crankshaft but you know what I mean.

Deleting makes no difference to overfilling. As mentioned, if you overfill to where the crankshaft hits the oil, you will get foam and trouble, however below this threshold there is a small advantage to more oil at lower temperature. You can go above the top mark by a little (as mentioned, maybe 1/4 inch) but that's about it

 

[Powder Hound]

Overfilling will put more pressure on the oil control rings. The more oil that gets past them, the more oil will blow out the exhaust and foul the catalytic converter. If the converter is deleted, then you just foul the exhaust while destroying the rings.

After that, probably the most damage that will be done is what has already been mentioned. More losses due to windage (oil churned by the crank and pistons), and possible seal blowouts if the overfill is severe and there is increased pressure due to the blowby that can't get out because too much oil is in the way.

All of these things are, of course, a spectrum of damage that will be realized in an amount proportional to the amount of excess oil induced. I doubt there would be much trouble if the overage is on a level where you are looking and wondering if that level you see on the dip stick is really an overfill with which you should be concerned.

In simpler terms, if it looks like enough that you should (or even could) suck out the excess, then do it. If it doesn't look like enough excess to go through the trouble of getting your oil sucker ball out, then don't worry, be happy.

Cheers,

PH

 

[jjblbi]

Over filling could cause oil foaming and increased crankcase pressure, I would avoid it. I thoroughly clean and hit the dip stick business end with white spray paint to make it easier to read.

 

[CleverUserName]

There is a YouTube video of engine with a clear oil pan installed. They keep adding oil and running it at high rpm to see the effect.

It was over 200% overfilled or 8 quarts in a 4 quart sump before the crank made contact with the oil in the sump. This is based on engine design and not every engine will tolerate 200% it’s normal capacity, so take this advice with a grain of salt.

With that said, I usually overfill 0.5-1 qt as I do extended oil changes and want extra oil to compensate for evaporation. I’ve never had any issues and oil analysis always comes back excellent.

 

[CleverUserName]

Here’s the video:

 

[privateTDIjet]

There is a YouTube video of engine with a clear oil pan installed. They keep adding oil and running it at high rpm to see the effect.

It was over 200% overfilled or 8 quarts in a 4 quart sump before the crank made contact with the oil in the sump. This is based on engine design and not every engine will tolerate 200% it’s normal capacity, so take this advice with a grain of salt.

With that said, I usually overfill 0.5-1 qt as I do extended oil changes and want extra oil to compensate for evaporation. I’ve never had any issues and oil analysis always comes back excellent.

I saw this video a while back. Very interesting and entertaining. Its also part of the reason why I made this thread.