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Gas from the past

How did those Sunoco pumps deliver so many octane grades? I assume they had only two grades underground (regular and premium) and just delivered them "as is" for the lowest and highest octane and then mixed the two together at various concentrations for the other grades? I started driving in 1971 and don't remember seeing any Sunoco stations in Northern California.
 
Just read about an ambulance that carries stolen gasoline for "resale".
There are sections of the underground gasoline distribution system in Mexico that are continually being tapped and "milked' by thieves. It gets transported using various tricks of the trade.

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Mexican gasoline at the pump is currently about $4.00 per gallon, more expensive than USA prices.
 
How did those Sunoco pumps deliver so many octane grades? I assume they had only two grades underground (regular and premium) and just delivered them "as is" for the lowest and highest octane and then mixed the two together at various concentrations for the other grades? I started driving in 1971 and don't remember seeing any Sunoco stations in Northern California.

Thats how they did it. There was a high test tank and a regular tank underground. The pump had five blends, regular on one end, high test on the other. In the middle was regular with just a little high test added, then 50/50 then more high test with a little regular. If the price of the high test and the price of regular was within a couple of cents, the mid grade wasn't making the owner any money. Back in the '70s you weren't allowed to make more than six cents profit on a gallon of gas. Anything more was considered price gouging. What ever happened to that law?

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Some stations that had more than two tanks underground could offer the racing gas at the pump. This pump really had the options on different blends.
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I wanted to buy one of those Sunoco Blend-o-matic pumps. It's actually a Wayne 511. They'r like buying a Mopar, rare and expensive.
 
Yeah stuff was cool, now i went to speedway and they have monitor on gas pump and everyone of the many pumps is on different display and what used to be quiet on early morning fill up, is now filled with weather, sports, news, advertising hotdogs on sale. It's too much.
 
Yeah the tv monitors on gas pumps is ridiculous. And people wonder why we have a shortage of electricity...
 
Thats how they did it. There was a high test tank and a regular tank underground. The pump had five blends, regular on one end, high test on the other. In the middle was regular with just a little high test added, then 50/50 then more high test with a little regular. If the price of the high test and the price of regular was within a couple of cents, the mid grade wasn't making the owner any money. Back in the '70s you weren't allowed to make more than six cents profit on a gallon of gas. Anything more was considered price gouging. What ever happened to that law?

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Some stations that had more than two tanks underground could offer the racing gas at the pump. This pump really had the options on different blends.
View attachment 637172 View attachment 637173
OR, switching the octane grade only switched the gears on the pump price and pumped regular old "ethyl", but that's just my suspicious nature.
 
Quote from post #18: "OR, switching the octane grade only switched the gears on the pump price and pumped regular old "ethyl", but that's just my suspicious nature."


Like the guts of the slot machine I saw one time (one of the old models) where one of the jackpot pegs/slots on one of the three spinners was blocked off to insure it would never pay a jackpot?
 
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