3.6L VVT Pontiac G6 GXP...FF is 5w30 dino. I have a few cases of Trop-artic 10w30 synthetic-blend on hand. Can I use it for this car? I am sure since it is 100* here it will be fine, but since it is a syn-blend oil, then it should be fine to use year round if I wanted too huh??? I plan to use 5w30 normally, but if I can get away with this for now I will. Please advise & thanks.