I just purchased a 5 quart jug of Yellow Bottle and a 5 quart jug of PP on sales. Both are 5w30. I have a 2012 5.7 Hemi, Ram 2500 I am wondering if I should consider mixing the oils, creating my own....Semi-Synthetic Pennzoil. What do you guys think? My Dodge Ram manual calls for 8k miles or 6 month OCI's. Do you think my home-brew would be good for that?