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Gas Mileage with Shell gas
I have been pondering this for a few years now, but I swear that I get about 1.5 MPG less when I use Shell gas. This past weekend for example, I fill up 2 miles from home, then we go to the lake Saturday morning. 140 miles one way, 30 of that is twisty 2-lane roads. At the lake there is quite a bit of idling pulling the boat in and out of the water. So, once we get back home, total of 290 miles, I fill up and calculate 15 mpg. If I do the same with Marathon or BP gas, I get 16.5 mpg. Same speed, around 73-75 using the cruise control most of the time. Anyone else on here seen a similar issue?
I have been pondering this for a few years now, but I swear that I get about 1.5 MPG less when I use Shell gas. This past weekend for example, I fill up 2 miles from home, then we go to the lake Saturday morning. 140 miles one way, 30 of that is twisty 2-lane roads. At the lake there is quite a bit of idling pulling the boat in and out of the water. So, once we get back home, total of 290 miles, I fill up and calculate 15 mpg. If I do the same with Marathon or BP gas, I get 16.5 mpg. Same speed, around 73-75 using the cruise control most of the time. Anyone else on here seen a similar issue?