In one embodiment, a pipeline interchange flows a product through an upstream pipeline. An automated analyzer is connected to the upstream pipeline to analyze different physical and/or chemically properties in the product and generate data from the product without extracting a sample from the upstream pipeline. An automatic splitter is placed downstream of the automated analyzer, capable of receiving and interpreting the data from the automated analyzer and directing the refined petroleum product into at least three different downstream pipelines, wherein at least one of the downstream pipelines is a transmix pipeline.