Does anyone know if the old Havoline 5w20 full synthetic(the ones in the metallic blue bottles, that Big Lots clearanced) are on the thinner side or thicker side of a 5w20. I know their conventional is on the thin side, but I recall this oil being a totally different animal. I have alot of trouble using the search engine on here. Does anybody know, I got about 7 bottles to use up, and wondering if I should use them up in the summer during the heat or wait till fall. When a thinner grade would be better, if there is such a thing as fall in Florida.