I just order some HDD 3k Amsoil. I'm having second thoughts between it and the 15-40 which I'd originally planned to order. Is there any real reason not to run the 3k over the 15 . I live in South Carolina so cold isnt and issue which is why i know i should have ordered the 15. This is a low mileage engine with only 56k on it. I thought I might try to send it back if theres any real reason not to just run it. I'm just going to switch out to 15 next time.

 

You should be fine. You'd be better off asking this question at www.bobistheoilguy.com/forums.