Originally Posted by joinco70
These are all great points. I will up the octane on the next full up and hope for some improvement. If not, oh well. We are loving the Expedition and the fact that the kids have more room, and the dogs are inside the vehecle rather than in the truck shell. As far as towing performance, the newer Expedition is kicking the 2007 Silverado's butt in comfort. We can hardly tell it's behind us. I know it will be dogging it a bit in the mountains, but that's okay. Thanks for all the input. At least I know our MPG is normal.
The trade off isn't even worth it. As long as you're using the manufacturers recommended fuel, just fill it up and drive. Here is an example with round numbers.
If 87 Octane is $2.00/Gal and you are going on a 100 mile trip at 9MPG...you will use 11.1 Gallons of fuel or $22.22
If you use 89 octane that is $.30 more per gallon (That's what it is around here), you would need to 10.35MPG to just break even....a 1.35 MPG increase or almost 14%. That's not going to happen.
The only thing that MIGHT, and I stress MIGHT give you better mileage would be if you are in an area that has ethanol free 87 octane gas. You might pay around 10 cents more per gallon than with 10% ethanol for it, but you MIGHT see enough of a MPG increase to justify it. Those 87 Octane ethanol free stations are HARD to find.
2016 Grey Wolf 26DBH following a 2014 RAM 1500 Outdoorsman
Life is good...Live it!
(2014) Nights Camped - 16 in 6 trips (2015) Nights Camped - 20 in 6 trips
(2016) Nights Camped - 21 in 7 trips