Is the Honda/Acura HTO-06 spec more stringent to meet than GM4718M for the Corvette? I wanted to try Mobil 1 0W-30 Advanced Fuel Economy but after side by siding it with 5W-30 I realized it doesn't meet HTO-06. Yet the 5W-30 meets both. I decided to ask you folks if you think the standard 5W-30 is actually the better oil? It wasn't the extra fuel economy that interested me. I simply thought the 0W-30 would have a better base(perhaps more PAO) than the standard 5W. After seeing that Mobil 1 conceals pour point data on all AFE 0W's, perhaps Advanced Forking Formula is the more appropriate name? - Isn't the 0W-30 actually thicker than the 5W or 10W-30 to begin with? - Which would offer the longer drain interval?