Can You Use 10W30 Instead Of 5W30. It is possible to use 10w30 in the colder months, although it is more appropriate in the warmer months. You can, but you will get worse mileage,.
With the major use of 10w30 being in the hot weather, but nonetheless, it can be used in cool weather conditions also. The 5w30 outperforms the 10w30 in cold regions. The 5w30 is better because it thickens less when cool or cold.
