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  1. #51
    Senior Member 577 Rep Points Dpro's Avatar
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    Quote Originally Posted by Capri to ST View Post
    I agree with this completely. There's just no reason to buy this car and then hold it back from its maximum performance by putting 87 octane gas in it.
    I do think the manuals are a little confusing on this point. In the ones I have, in one place it does say that 87 octane is recommended. However, as you pointed out earlier in this thread in another place in the manual it does say that the maximum horsepower is achieved on 93 octane. The clear message for anyone that cares about their car is to run 93 octane in it, or 91 if that's the highest you can get. I suspect Ford may want the best of both worlds here, telling people who are concerned about the higher cost of premium gas that they can run it on regular, while in a more obscure way letting people know that they should really be running premium. They should just tell people that they need to run premium period, as an earlier poster said. For me, it's been so long since I've had a car that runs on regular I barely even notice that pump when I go to the gas station.
    This is my take, some guy at Ford In Detriot sat there and said how the fxmx are we supposed to sell a friggen souped up economy car saying it requires premium fuel. I know we will put in the manual that you can run it on 87 of course the ECU will retard timing and lower boost and it wion’t be as powerful. Then we will put its best to run it on premium.
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    As long as they don't have to compromise on performance, there's nothing wrong with being able to offer the best of both worlds. My 13.1/1 compression motorcycle engine runs on premium only. But it doesn't have special cams that can modify mechanical valve timing on a whim. All it can do is modify ignition timing.
    2016 Ford Fiesta ST Kona Blue ; Engine, Suspension will remain untouched ; Southwest Ohio ; Winter: 215/45R17 Continental ; Seasonal: 205/40R17 Bridgestone

 

 
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