Is there any danger in adding a quart of gear oil to your crank case?

Assuming you're out of 10-40 and your case needs a quart of oil.Is there any danger in adding a quart of gear oil to your crank case?
Ive seen cars run on 75w90. The only problem is the amount of time it takes to get the gear oil up to the bearings might be too long before you do damage.


P.S. It will never start in cold weather.Is there any danger in adding a quart of gear oil to your crank case?
it will start harder in cold some people do this for severe oiul burning
It is not advised to mix different types of oils. You risk internal damage.
gear oil is not made to be gasoline resistant. it will absorb more gas %26amp; potentally ruin your motor in time. if it was just for a couple of miles to get to a service station then ok. but def. not for prolong periods of time.
Do not mix oils intended for different purposes. They are formulated for the use they are intended for and do not possess the additives critical to other uses.