need oil advise

Last change use Moble 1 yellow 15w-30 (suv-truck) in Honda 1100cc. Now having money problems. Can I change back to "regular" oil without damage?

yes

Yep, sure can. I actually use Shell RotellaT synthetic. Its heavy duty oil 5w-40 and it works really good. It cost around $13 for a gallon of it. They also have it as a non synthetic 15w-40 which will run for around $8 a gal.