Mobil 1 oil weight

[Ameer Antar]

I'm about to do an oil change and was wondering what's the consensus on running
full synthetic 10W30 during the early summer. That's what I ran during the
winter, but not sure if I should change that up now. I live in CT, so temps
will definitely be in the 80's when I need another oil change. I know the
manual calls for 15w40, but I'm not sure if that applies to full synthetic.
There is a 15w40 available in the extended performance oil, but it's more
expensive and very hard to find around here. So far, no ticking noise from the
lifters, but everything is fairly new. Am I going to do any damage running
10w30? What about 0w-40? TIA.
 
-Ameer