Is it ok to switch from Mobil One Full Syn. 10w30 to 5w30? I figure it might benefit me and my car during early morning rush to school and not having time to heat up my car. I've been using 10w30 for about 10,000 miles now. FRAM sucks.. (peep) -jay
Your choice is dependant upon your climate. Some people switch depending on the season, but there's no problem switching them. The manual lists both 5W-30 & 10W-30 dependant on the temperature range you anticipate.
Nothing wrong with running 5W in the winter and 10W in the summer.