I recently moved back to northern Ohio after leaving for a job seven years ago. Before I left I had a Cutlass that I scraped and painted the underside every summer. It was also rustproofed in the doors and quarters when it was restored. The car was showing signs of rust when I sold it.
My question is: What is the best method of rustproffing up north? I was told that a 50/50 mixture of used motor oil and diesel fuel would be good.
My uncle from Canada told me that the acids in used oil will not protect the metal. He had an old F250 that was very rusty. He told me he regularly sprayed it with used oil. He had around 400k miles on the truck and traveled all over the United States and Canada. He said I should use new oil to spray my vehicles. He says he now only uses new oil to spray his vehicles, because the acids in used oil will harm the metal.
Should I use new oil or a mixture of used and diesel?
I have four vehicles to protect. I can't use oil on the Toyota, because it goes to shows and it raced regularly. It has to be oil free for the track. It is garage kept during the winter.
All the vehicles are showing sings of rust after the few months of salt that they have been exposed. I know the vehicles won't be around forever, but I don't want to be painting them all the time.
My dad has a salvage yard and body shop. I can get all the used motor oil I need. I can also change out gear oil and hydrolic fluid and use the old.
Any suggestions or personal experience would be greatly appreciated. Thank you in advance.