yea, it amazes me how many people are still running heavy weight oils, ontop of STP Oil Treatment, or Lucas Oil Thickener, in say, a Toyota Prius!
One time I went to one of these Pennzoil Quick Lube joints, self-standing in a gas station parking lot, etc....it's own covered/single-garage building, and all the dude had on tap was 10W-30 and 20W-50......I was like dude really? This is 2010 (at the time), most vehicles are specing 5W-30......and then he tries lecturing me about the "heat" being so bad here in FL, all cars needs 10W-30.....etc, lol.
And this guy is allegedly "ASE Certified" (at least the logo is on his building, and on his [censored]....).