No need to swap between 5w-20 and 5w-30, just stick with 5w-30 year round.I've even thought 5 20 in winter and 5 30 summer. What about timing chain protection? Pump ability and all that?
You get nothing extra using 5w-20 in winter.
Timing chain wear is not an issue, and seems everyone is worrying about timing chains now days.
Sure there are some engines with poor designs and parts, but these 2.4's are not a bad engine.
Engine will not have an engine issue with regular oil changes (even with 5w-20) for the life of the vehicle. You will have transmission issues well before the engine gives up.