Unless the climate shift in your area is incredibly severe, changing oil weights isn't necessary.
Slightly thinner cold-weight oil may help with lubrication on start-up and the same can be said for slightly heavier cold-weight oils in the summer. There can be questions about swapping between 0 and 5 cold-weight variants for summer or winter, however, the difference between a 0-weight and 5-weight oil is negligible and considered acceptable for year-round use in most climates.
Most manufacturers recommend a range of oil weights applicable to varying climates. It's best to consult your owner's manual for information on selecting the proper oil weight.
To shop for oil that's right for your vehicle, head over to fcpeuro.com and enter your vehicle into the fitment selector.
Once your car is added to the selector, there are a couple of important ways that we advise correct fitment.
The first is the "fitment indicator" shown on the Product Page after selecting a part. This box is below the "add to cart button" and has two states. It will either say " Yes this part fits" or "Part may not fit, click to verify".
Sometimes the green box will be accompanied by extra fitment notes. These notes may be independent of the information gathered by the vehicle selector. IE: VIN-specific options, need to be taken into account when determining overall fitment.