Hello you guys I know there has been plenty of questions asked about synthetic motor oil but my question is

I have been running royal purple for about 4 months now and it's time to get a change... But it's starting to get cold around my way.. I'm in Kansas btw and it gets cold here so I want to stay with royal purple or any other synthetic that is just as good..

Would it be wise for me to change my oil with a thicker synthetic since its almost time for the winter months if so which would you guys recommend?

 

5w30.

 

agree 5-30 should be fine, not sure you'd want a thicker oil especially for cold start ups.

 

for cold weather you would want to use a thinner oil,
thicker oil is for the hot summers
+2 on the 5-30

 

Just to be clear. "Cold" for motor oil is around -30F. If you plan on starting your car below that temperature you may want to consider a different viscosity of oil. (at temperatures that low, oil is not the only thing you seriously need to worry about) "Hot" for motor oil is well above your engines normal operating temperature, so if you plan on running flat out fully loaded in death valley at noon on the hottest day of the year your 5w30 oil isn't going to be your most concerning problem there either. If you want improved fuel economy, more performance, or longer engine life then there are better things you can do with your time and money than trying a thicker or thinner oil than the car was designed for. That said, the operating viscosity of common motor oils from 5w20 to 15w50 overlap enough that I doubt that any of them, changed regularly, would cause any problems.