Another BPD and Delta question.
I also installed the same version BPD cooler as you (for the same reasons), BPD EGR cooler, and new OEM oil cooler (all preventative, not reactive). IIRC, the 'acceptable' factory delta was 15º. I was also getting concerned for the same reason as I was paying strict attention to my scan gauge values for oil and water temp. I regularly see deltas of up to ~20º, usually only until it warms up. The water temp climbs much quicker in the mornings than the oil which I would expect, but stabilizes and stays within ~5-8º once everything is up to operating temp. Perhaps a bit early to tell, but I havent had any issues, and am quite happy with the setup.



