Dealership filled engine with too much oil...

[nemelek]

Originally Posted by AbsolutelyRed

I have confirmed at least 5 or 6 times now that 3.9 quarts is correct. There's no way I can figure out that 3.5 quarts would be enough oil for a full fill (assuming a complete drain and a new filter, and an accurate level reading).

AR

Just did my oil change 2 days ago. Went and checked the level while reading this post and the 3.9 quarts of oil I put in put the oil level right at the top mark.

[posaunemeister]

Originally Posted by nemelek

Just did my oil change 2 days ago. Went and checked the level while reading this post and the 3.9 quarts of oil I put in put the oil level right at the top mark.

Yeah, I went back and checked my oil level after adding those 4qts and I was barely beyond the max fill level. So I drained some of it yesterday evening. I'm going to check the level right now, as the car has been sitting outside in the cold all night long.

[Yaris Hilton]

Originally Posted by posaunemeister

Yeah, I went back and checked my oil level after adding those 4qts and I was barely beyond the max fill level.

Same here. No way I'm going to drain it, as it's not hurting a thing. And no way am I going to try to measure and subtract 0.10 quart when filling my engine. I'll put in 4 and drive off happily. Putting in another whole quart would doubtless cause problems with oil splashing, aerating, excessive oil consumption through the PCV system, etc., but an overfill of 2.5% isn't worth obsessing over. Completely negligible.

[Sir A.Y. Atoyot]

The way I heard it, what happens when you put 'way too much oil in an engine is that the crankshaft counterweights and the big ends of the connecting rods hit the oil and beat it into a froth. Enough of that and the oil pump starts sucking air. Since air is compressible, unlike oil, this can cause an air lock, and goodbye bearings! OP is lucky if no damage was done.

[Yaris Hilton]

Originally Posted by Sir A.Y. Atoyot

The way I heard it, what happens when you put 'way too much oil in an engine is that the crankshaft counterweights and the big ends of the connecting rods hit the oil and beat it into a froth. Enough of that and the oil pump starts sucking air. Since air is compressible, unlike oil, this can cause an air lock, and goodbye bearings!

Exactly right. My point is that 4 quarts isn't "way too much oil." Toyota's engineers are competent enough not to put their recommended fill level right on the brink of disaster. There's a considerable margin for error.