If you use exclusively full synthetic oil (including GIII) in any of your vehicles, please list: 1. Brand/type of synthetic(s) you use 2. How much you pay for it 3. Engine/application 4. How long your OCI is (OCI's are) I will NOT come back and tell you how "foolish" you are - it is not my place, and I really don't care which oil you choose, because whatever works best for you is cool with me. I don't want this to turn into a flame-fest! I'm just curious how the numbers shake out. TIA!