About 2 months ago I bought a Fram Sure Drain system for my Lumina. Worked great so I just bought another one for my Tahoe. Both are model SD-4 so they are identical. Now here is the interesting part. The most recent one has a warning printed on the packiing material saying it is not for use on Saturns. I still have the package for the first one and the warning is not on there. Anyone have an idea why? Could the sludge in some Saturns prevent the oil from draining through the holes in the Sure Drain? If so, I wonder why they don't mention Toyotas in the warning too. Or could the warning be for some other reason? Maybe the drain on the Saturns don't have clearance around them or something? Anyone have an idea?