Friend of mine has a Jag F-TYPE with the blower 5.0. I was kind of dumbfounded when I flicked through the owners manual to find 0W20 as the only recommended oil.....at all. Went online to Jaguar's customer center and pulled up the rec there......0W20. Now, he beats the ever loving daylights out of this car. Something about a Supercharged 5.0 510HP V8 carrying such a thin oil feels ridiculous to me. My Eurotrash V8 doesn't even make that much power and Maserati has now upped my spec from 5W40 to 10W60 for hot climes. He's up for an oil change, and part of me wants to dump in some Euro 0/40. Is there really some engineering magic I'm missing here that he should go with 0W20 on an out of warranty car like this getting it's ashes hauled in the middle of FL summer?