Why is it bad if you put too much oil in your car?

At the minimum you'll suffer from ';windage'; which is when oil sloshes around in the pan and slops up onto the reciprocating assembly. This definitely causes a loss of efficiency.





Yenkoman: I don't know if too much oil can cause engine damage as the answerer above me has stated, but I do know that it can decrease engine output. I'm sure you've heard of a ';windage tray'; which prevents excess oil from sloshing up onto the crank and rods and putting unneccessary drag on the reciprocating assembly. Obviously you need enough running through the engine to keep it lubricated (thats why the manufacturer sets guidelines and why the oil has its traditional routes through which it travels.) But too much of a good thing is, of course, too much and having your crank covered in oil will not allow it to run as efficiently as possible. This probably means nothing on a commuter car, but on a 400hp high rpm smallblock it can definitely present an issue.Why is it bad if you put too much oil in your car?
the oil level is upto the bottom of pistons,conrods,etc can cause your engine to lock up because there is no air gap in the sump.can also suck oil up past the rings and out the exaust.can do lots of engine damage if u dont drain some oil outWhy is it bad if you put too much oil in your car?
he oil level is upto the bottom of pistons,conrods,etc can cause your engine to lock up because there is no air gap in the sump.can also suck oil up past the rings and out the exaust.can do lots of engine damage if u dont drain some oil out
Interesting answers. Oil is a lubricant first of all, secondly it takes heat away from the parts. Too much oil and there will be a pressure build up in oil pressure and heat causing the bearings most likely to be the first to go. But I am curious as to why oil on the con rods and oil being flung up to the cylinder walls would be a bad thing? If there would never be any oil that lubes the cylinder walls, what lubes them. This is a question for those that have answered before me. I know the answer, I am just curious as to where they are coming from. Your oil pump does have a pre-set by-pass, spring type set up. But if it cannot move the oil and heat fast enough there will be pressure problems. Of course, you don't want so much oil that it blows by the rings and out the exhaust.