You must use the same wight oil. It should still take 5W30.
Synthetic oil will improve gas mileage, power, not noticeably but some and it will deiinately increase the life of the vehicle. However, if you do not keep up pon ALL the manufacturers recommended services, it will not be worth it.
I can't tell you how many motors I have seen blow up from the Anti-Freeze not being changed. You don't have to live in cold area, you must follow all manufacturers specifications to make spending money on synthetic worth it. If you do that, then it is worth it.
Friday, February 24th, 2012 AT 2:02 PM