Supercharged111
Truly Awesome
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I put "synthetic" in everything including my riding lawnmower. When I run out of my current supply of "synthetic" oil, I'm considering spending extra to buy real synthetic oil.
REAL synthetic oil (Group IV) is expensive; but here in America we can buy "synthetic" (Group III) oil made from...oil...at reasonable prices.
Our "synthetic" Group III oil (made from oil) can't be sold as "synthetic" in Europe--but America's politicians are the best that Corporations can buy. (And some of our courts are run by the stupidest judges.)
www.machinerylubrication.com/Read/29113/base-oil-groups
Base Oil Groups Explained
Almost every lubricant used in plants today started off as just a base oil. The base oil category defines what the oil is made of, how it is manufactured, and how the lubricant handles certain environments such as extreme heat.The American Petroleum Institute (API) has categorized base oils into...www.machinerylubrication.com
Thought you had to plunge for group 5 for a real synthetic? Either way I do the biggest split possible, i.e. 0W40 in trucks, to cover down year round. Smaller first number is always better. A synthetic when broken down reverts to the higher number, not the lower. I'm not sure if that differs by base stock or not, but if you've gone that far you're overdue for an oil change anyway.