New Neighbor Said: "You're killing your engine"...thoughts?

[Kenny Boxster]

10-40 is a great weight for your climate, especially summer time. As a matter of fact, I feel that using 0w or even 5w would be too thin. Down here in Texas, with hot ass temperatures of 93F+ a day and three months straight of 100F+ we have Porsche enthusiasts that use 15w-20w-40-50. I personally use 10w-40 high mileage in my car, and have never had a problem. Was actually looking to see if I could find me some 15w-50.