On 5/4/2021 5:25 PM, Dan Purgert wrote:
A neighbor has wood steps that are very dark and look almost new.
He said they are not pressure treated and are more than a decade old.

They've been in the ground this whole time and haven't aged a bit.

He pours his old motor oil on them whenever he changes his oil.
I could see where he did in that some wide steps were stained darker.

Does motor oil prevent bacteria and mold and insects from eating the wood?


I know of people doing similar things and the wood lasted for years. Of
course, depending on how much he is pouring and where it goes, he may be
contaminating the ground water.

It will soak into the wood. Farmers have used it for fencing.