matty

iTrader: (54)

Lets put this to rest...

I have been using 10W-30 ever since I bought my car...I live in NJ kinda cold mornings but nothing to to bad...

Its starting to get cold again and I was wondering if i should change to 5W-30 for the winter or stay at 10W ??

I want my car to be safe for those morning startups...

BTW: I am talking about Fully synthetic Mobil One Oil

-matt

vsamoylov

Here in Cali, I use 5-40 valvoline pure synthetic. If I could find, 0-40, then it would be better cause mornings are not that cold. No snow at all.

johnny2kgle

matty,

Mobil 1 10w-30 is fine down to 0 F or more. Mobil 5w-30 would be preferable for the winter but not absolutely critical. The 5w-30 would give you easier startups and perhaps slightly better fuel economy.

MAXTOUT

I use Castrol Synthetic blend 5w-30 in the winter (10w-30 in the summer). I am in NE Colorado and it gets pretty cold here.

icesiklez

i have run 10w 30 for a long time winter and summer runs great and starts fine.

skiboarder72

I've always used 5W 30 cuz it gets crazy cold up here

iwannabmw

iTrader: (3)

Either is safe to use. The 5W-30 is still the best choice though.