You definitely need to change the oil as the Trans Fluid is much thinner and doesn't do the same job engine oil does .
Further, the lubrication properties are very different. ATF-Automatic Transmission Fluid- needs to TRANSFER a lot of 'momentum', that is, the torque converter needs a fluid that is somewhat heavy but of very thin viscosity, therefore that kind of fluid can by used to transmit a lot of force thru the converter halves, and do it without a heavy friction (viscosity) looses. Friction reducing needs are second nature.
Engine oil has a completely different set of requirements: friction reduction primarily, cooling and a cushioning effect. Therefore, those two liquids have to be very different.
Placing more than a few ounces of ATF into the engine crankcase will destroy its properties, risking the engine. Complete flushing and correct engine oil replacement is mandatory! amclaussen.
You should drain the oil in the engine. Put engine oil back in the engine because the transmission oil is not made for engines and will hurt the moving parts of the engine if left in.
If you mean automatic transmission, engine oil will ruin the the seals and friction material. Do not drive, change the fluid immediately.
It is possible to thin the engine oil far enough that it loses it's lubricating ability and could cause irrepairable harm to the engine. Engine oil lubricates. Transmission oil is designed to run through a pump as it lubricates. An automatic transmission is a pump. Totally different from the oil pump found in an engine.
Its going to tear up the engine
Which oil? Engine, transmission, power steering oil?
If you accidentally did that then drain the engine oil out immediately and pour in the correct weight oil.
It will slowly destroy the engine.
The same oil as you put in the engine!
The viscosity of the oil may not be heavy enough to protect the engine.
no. This will cause problems in the transmition.
your question is a bit ambiguous if you are talking about he engine oil filter it has nothing to do with the transmission do NOT put automatic transmission oil in the engine you will blow the engine
If you mean "in" the engine, as in "instead of motor oil," the answer's no. I guess you could probably put it on the engine, if you can explain why you'd want to.