Quote:
Originally Posted by kf4rca
Here's what I do.
The next you change your oil, save it and "paint" it all over the underside of the vehicle.
You'll need a 4" wide paintbrush. Its a messy job so wear some old clothes.
If you get it on the exhaust system, it will burn off.
The plus side is that it saves the chassis and you only have to do it every couple of years. Good luck!
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Good to drive over a dirt road immediately after doing that. The dust will mix with the oil and form a oily sludge that's harder to wash off than the oil alone...that stuff, if it builds up thick enough, can protect cars for decades.