I'm starting to rethink the rational for early OCI for TGDI. The F150 2.7EB and 3.5EB I've seen with good trending of UOA have no real correlation with Fuel Dilution and Interval. A 2,000 mi sample is just as likely to have a low flashpoint or high fuel as a 10,000 mi samples. Also while anecdotal both of the 400,000 mi Ecoboost I'm familiar with have higher mileage OCI (In the 20-0% of IOLM Range). So my question is if fuel dilution is a constant assuming the oil holds up to the dilution what are we accomplishing with the early OCI? Would basing the change on things like iron ppm per 1000 mi (ie traditional standards) make more sense?