I worked for Standard Transpipe for several years. we stored Gas, Diesel, and Jet. The fuel was blended before we ever received it. We never knew the ratio of #1 to #2. I had to sample the tanks daily when I gauged them. Sometimes it would be zero outside. Sometimes the fuel would not react to the cold while sitting in the sample container. Other times it would cloud and even gel. My point is, if you sampled The place where you buy your fuel every day and they have a lot of throughput, the samples] numbers would be all over the place. it’s not consistent so I use an additive.
As far as the temps I mentioned, the -7 was not angel temp or anything other than a trigger for when winter blend would go into effect. Like I said, winter blend would be used or start when the temps are projected to go to below -7. Yes, it would gel before then, but not immediately in the storage tanks. When you are talking 40,000 barrels (42 gal/barrel) it takes a while to cool down. The -7 trigger indicated that extreme cold was coming and that we would be receiving winter blend in the next batch.