I've a 2016 Colorado Duramax diesel with a 2.8l I4. Walmart has 5 quart jugs of Pennzoil Platinum Euro L 5w-30 C3/dexos2 for a very reasonable price of around $23.00. The quarts not so much $7.00 I have a two leftover quarts of Schaeffers 8008 ADVANCED EUROPEAN PERFORMANCE MID SAPS SAE 5W-30 ACEA C3 which is dexos2 and VW 507 suitable that I want to use up. Additionally both are API SN. What are the BITOG gurus consensus on using 5qts of the Penn and a quart of the Schaeffers as the sump on the Colorado is 6 qts capacity. Seeing how they are both C3, dexos2 and the same weight would this be advisable?