BenzWorld Senior Member
Date registered: Sep 2003
Vehicle: SL500, ML320, E320
Location: Scottsdale, AZ
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RE: Gas octane ratings
dahappybanana is correct - -
ALL automotive gasoline starts off the same . . .the greatest variable is octane. What you buy at your local Shell station may well not have been produced at a Shell/Equiva refinery, but it had Shell developed additives put in at the terminal rack in your city where the pipelines come out of the ground.
For example, more than 70% of the automotive gasoline here in Phoenix comes via pipeline from the LA basin in California - -through San Bernardino and along I-10 to the Phoenix tank terminal on the west side of the city.
Every reseller in the Phoenix area-- 76, Chevron, Shell, ExxonMobil, QuickTrip, pull their fuel from that terminal-- when their tanker trucks are filled, the "V-Power", "Pro-Power", etc additives go into the truck.
Independents get the same gas on the spot market- most get whatever is cheapest or surplus to the market that day. And most if not all have additives--they just don't always know whose.
I'm certainly not an expert, but have a bit of experience in this arena, and simply scratch my head over the wonders of effective advertising !