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Message: <blockquote data-quote="FishFreak" data-source="post: 2102109" data-attributes="member: 65712">Is your dipstick spiral twisted like they tried shortening it cuz it was too long? Mine is. Never seen one this twisted!My screw calls for 5w-20, but I call bs on that grade. It's got 140k miles, so I'm sure there's plenty of bearing clearance to run thicker 5w-30. Makes me sleep better because once an Amsoil rep PROMISED me I could run 5W-30 instead of 15W-40 in my Duramax diesel. I did for a few thousand miles, and I'd swear I could hear more clatter. I couldn't take it anymore. Sent some oil off to Blackstone labs and it came back with enough iron and bearing material to make you sick. I'll never do that again. Err on the thick side if you live in warm climates.I think these silly light weight zero spec oils are because of unrealistic CAFE fleet MPG regulations, which are rumored to be going away or be severely diminished this coming year.</blockquote>