Actually, throughout the owner's manual it always stresses that even
though 10W30 is OK for warmer climates, 5W30 is better in any
condition. So much so that the oil cap is marked "Use 5W30", or
something like that.
My owners manual recommends 10 w 30 all year - however 5 w 30 can be
used when the temperatures will be below 50 degrees.
1991 Pontiac Bonneville LE
3800 V6 ( C ), Black/Slate Grey
_~_~_~_~277, 300 miles_~_~_ ~_~_
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