Originally Posted by CajunDodge
.At exactly which point in the process the different additives used by different companies for different markets/regulations etc., are added is a good question that I would like to look into further
When I took the Hazmat tech training, part of it was going to the Port of Miami where a lot of hazardous materials and fuels are received. We also went to a fuel distribution company to learn about tanker trucks. At the training they told us that the fuel when it arrives at the port on the tanker ship differs only by octane. All the company specific additives are added at the port at each company's facility. So Shell might have a receiving site at the port, receive their fuels, add the chemicals, then truck it out.
Hope that helps.
Oh and I do as the manual say's 89 octane in my truck.