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post #11 of 133 Old 03-10-2013, 06:38 PM
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My understanding is the 2.0 engine develops 240 hp on premium, and 231 hp on regular. I suppose that possibly, depending on the situation, that with more power your engine isn't working as hard and therefore might get better mileage, but it doesn't seem that 9 hp (I don't know about any torque difference) would make that much difference....
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post #12 of 133 Old 05-14-2013, 10:00 AM
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Why not compromise and put in 89? Just wondering.
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post #13 of 133 Old 05-14-2013, 06:01 PM
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Here 89 octane has 10% ethanol...costs a nickel less and knocked my mileage down a little more than 10%. Doesn't work for me.

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post #14 of 133 Old 05-14-2013, 07:30 PM
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Ahhh ethanol, I have read that ethanol contains less energy. Possibly premium vs regular test maybe flawed w/o knowing the amount of ethanol in the gas.
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post #15 of 133 Old 05-17-2013, 08:56 AM
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Never over 18mpg

I have 1500 miles on my AWD Titanium and I cannot get over 18mpg, even using hypermiling techniques on a purposeful 200 mile easy drive road trip on all highway.

I guess I will have to be satisfied with performance and NOT economy.

Ford says it will get better around 3000-5000 after the initial break in.

I cannot see a 10mpg increase from an oil change.
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post #16 of 133 Old 05-17-2013, 03:59 PM
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87 is what the OM says. With the higher octane I do not believe the engine would benefit from it with all stock internals and breather mods.

I run 93 in my lawn equipment.

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post #17 of 133 Old 05-17-2013, 07:34 PM
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Quote:
Originally Posted by rustygray View Post
I have 1500 miles on my AWD Titanium and I cannot get over 18mpg, even using hypermiling techniques on a purposeful 200 mile easy drive road trip on all highway.

I guess I will have to be satisfied with performance and NOT economy.

Ford says it will get better around 3000-5000 after the initial break in.

I cannot see a 10mpg increase from an oil change.
After 2100 miles my average is 23.7. This is probably 85-90% highway (rural North Dakota) driving. Pure 87 octane in every tank except for 1 tank of 89 octane with 10% ethanol which gave 10% less mileage (just as I figured). Flat interstate driving at 75 mph yields between 25 and 26 but a stiff head wind will raise heck with that. It for sure needs a bigger gas tank.

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post #18 of 133 Old 05-17-2013, 08:11 PM
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In OR everything has 10% ethanol. But I hear they don't regulate the amount so it could be much higher at some gas stations.
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post #19 of 133 Old 05-17-2013, 11:07 PM
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First off, I do know better. You are generally wasting money buying a higher octane rating than is specified, but with all the hype my wife and I did a bit of an experiment.

We took a 1500 mile drive (each way). Used regular one way, then 91/92 premium for the return trip. Mostly 75mph interstate. 26MGP both ways. The total elevation difference was minimal, and it is true that climbing and then decending hills in between can make quite a difference, even with a nearly net total elevation change that is not worth mentioning, wind could have been different each way as well. So of course this is not entirely scientific, but personally I didn't notice any seat of the pants excitement using premium. I'm sold. 87 octane works great. If it makes you feel more racy. Knock yourself out. Spend an extra two or three bucks each fill up.

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post #20 of 133 Old 06-04-2013, 04:59 PM
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The 1.6 and 2.0 ecoboost will make more power and at what is advertised on premium which is 91, since it's the highest that some states have. So that's what they base it off of. If you use 92 or 93, you will have an increase in HP. Now with these cars, even a 10 HP increase at the crank, maybe 4-5 at the wheels...will you really feel that....no. Is it there...yes. The past cars that have EEC's that can not adjust timing, if they are recommended for 87, better use 87. unless it's tuned for it or has higher compression. Alot of the newer vehicles that have VVT or the i, they can actually sense the fuel octane and adjust the timing...with higher octane, more timing, more power. That's all VVT or VCT or so on does for you car...constantly adjusting timing for peak curve at all rpms while you are pushing the gas pedal.

Even seen this with Mustang GT's that have the VVT. They drained it, put 87 in. Made XXXrwhp. Drained it and put in 91 octane and it made 5rwhp more. Then they did a Mustang V6 the same way, didn't have VVT. It actually lost 5rwhp on the 91 octane, which makes sense. It can't adjust to the octane and 87 is more flammable than 91, so most of the gas is unburnt and just get's exhausted out. Which if you have cats, can damage them.

I think if you haul a good amont or tow, i would def use premium. The cost of 87 vs 91-93, i don't think it's worth it for normal driving.

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