I have a good number of GTX Synblend 5w30 and EDGE SPT 5w30 jugs in my stash. The blend was for a car we dont have anymore. I have now decided to use 5w30 in the the Sonata 2.4 seen in the signature, and not 5w20 (not that I'm anti-xw20). As my signature suggests, my intention is to alternate these oils every oci. There shouldn't be an issue, correct? Hyundai 2.4 4cyl, non-turbo, GDi.