The first question is easy--87. The others are just a waste of money given the engine design and calibration.
I avoid stations with E10 fuel (i.e. 10% Ethanol), such as Shell & Sunoco, since they contain roughly 5% less energy than 'regular' gasoline and thus cause a drop in fuel economy. If Ethanol were actually cleaner or reduced our dependence on foreign oil, then I would reconsider, but the evidence is not convincing with present processing. I avoid Citco for the obvious reasons. I generally use BP or Marathon.
[quote author=fuzionblaze link=topic=80537.msg1488711#msg1488711 date=1181870841]
Hello everyone, Which fuel is better for the Ford Fusion, 87, 89 or 92 octane gas? And which gas station you prefer to pump gas at?
Hi fuzionblaze! :wavey: The Fusion only needs a good quality 87 octane fuel (check your Owners Manual). Paying for a higher octane will bring no increase in performance or MPG (unless you have retuned your Engine Management System to take advantage of the higher octane).
What I am going to say next is not intended to aggravate anyone, just save you money. A few members will possibly now tell you that they use a higher octane (on a stock engine) and get better better performance and higher MPG. If it were true, Ford could easily recommend a higher octane to get a better EPA rating, and higher Horsepower ratings for the 3.0. Ford does not make those claims with a higher octane, because there are no benefits. The Engine Management System is not programmed to take advantage of higher octanes.
If anyone saw a tangible benefit with any higher octane fuel, it was most likely due to a poor quality 87 octane being used previously.
Again, I do not say this to insult anyone, but if I have my choice between believing Fords Automotive Engineers, or a non-professional opinion (including my own), I will choose the Automotive Engineer every time. They designed the car.
Short story, use a high quality 87 octane (the recommended fuel), and save your money.
Personally, I use Exxon-Mobil, Shell and BP-AMOCO, in that order of preference.
With my car, I have found that Shell gives the best gas mileage and Sunoco the worst. The Sunoco stuff goes through the car like water (I'm guessing because of the ethenol mixture like a previous post mentioned.) Ironically enough, on my daily commute, the Shell station is the most out of the way and the Sunoco is the easiest to get to! :? As for performance, I don't have any proper instruments to test any of this and I couldn't detect any performance variations. I have tried all of the major brands and all of the fuel economy numbers are fairly close and the difference between the Shell and the Sunoco is approx. 1-2 litres/100 kilometers. I only put 87 octane in as per the manual as it is still in stock tune.
[quote author=cos link=topic=80537.msg1536743#msg1536743 date=1183577328]
I use mostly Marathon which I think is Shell gas. As mentioned above Terry Dyson likes Shell and if he likes it I use it.
Shia, you can't go wrong with Chevron or Shell. I can't remember the last time I didn't fill up on Shell gasoline, but if I was not around a Shell and HAD to fill up, I'd go with Chevron.
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