Synthetic is better in every way. However for practical purposes, in DDs the main benefit is the higher OCI. You're not stressing the engine so much that it would require or benefit the extra performance of synthetic. So the main benefit is the longer interval. Also 3k for dino is very short. Even for dino I don't think any manufacturer nowadays sets the interval at 3k, and recommend 5k or 7.5k.
Originally Posted By: krunk
So by that logic I will get the same result doing a dino oil and changing at 3k as doing a synthetic and changing at 10k