I was at O'Reilly's yesterday getting a small vacuum hose and did my obligitory walk through the oil area. I saw some of their house brand oil that said "SA 10-30" in big letter on the front. Upon further reading on the back of the bottle it did say no detergents and not suitable for modern engines, but that was in not very big print. I wonder how many people just buy the cheapest oil they can find and pour it in, not realizing they just put a sludge time bomb into their engine.