I drive a 2010 Corolla with 108k mi. During the last service a mechanic used 0w-20. My mechanic was unavailable so I took it to the Toyota dealership for servicing this time. They used full synthetic 05w-20. The cap states it can take both 0w and 5w. Will switching between the two cause any issues? I live in CA so I don’t have to deal with excessively cold weather.
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No, it will not cause issues. Both oil weights are in spec.
Totally NOT a problem, unless you expect 20 -30 Below Zero temperatures!
Nothing to worry about.