- Joined
- Jul 2, 2007
- Messages
- 5,294
87 octane reg unleaded, 89 octane "plus" and 92/93 octane "premium." When is the 89 and the 92 or 93 grade product mixed, is it refined as all 87 octane then bumped up to 89 or 92/93 at the depot, or when loaded onto the tanker truck, or does it happen at the pump at the feuling station? i.e. does the tanker truck have three compartments one for each grade of gasoline, or does it only carry base 87 octane reg unleaded and the gas pump at the station adds additive in ato make 89 or 92/93?