I am new to the 104 engine and I am wondering if 5W30 is too light for a winter oil in this car. I always thought that in cold weather you want the first number to be low so that oil reaches the top end as quickly as possible. I would love to hear from anyone who has this motor and what then run in it during the winter and the rest of the year as well. Thanks for your help. I know that the previous owner used 10W30 in the winter and 15W40 the rest of the year.

Antonino