Use Mobil 1 SuperSyn 5W/30 all year OR Mobil 1 SuperSyn 5W/30 for winter AND Mobil 1 SuperSyn 10W/30 for summer in New England ?

 

I use 5w30 in winter and 10w30 in summer. Never had any problems starting in winter at all. Even this winter when temps here got to -20(during the day!) for almost a week straight.

 

There is an oil/fluid forum on these boards that recommend what you should use when you should use it. Its a sticky.

Go by the tempertures. I dont know how warm it gets in NE or I would say 10w/30 for most good summers. But to be safe read the stickie.

Proph