Opinions on running the 10w30 flavor for west Texas summer. Says it's a mixed fleet oil but have read that some cj-4/ck-4 oils may cause issue with cats. 115k on my engine. 60/40 hwy/city driving. Outside temps will be over 90 all summer long....joy....
http://www.deloperformance.com/en-us/products/Delo400XLESAE10W30.html
http://www.deloperformance.com/en-us/products/Delo400XLESAE10W30.html