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Old 05-01-2012, 08:53 AM   #131
Elizabeth
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I prefer to use 93 octane as it does seem to get better gas mileage.
Plenty of arguments from folks who think only a fool would waste money on premium...
So all I can say is try it.
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Old 05-01-2012, 08:56 AM   #132
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i am now into my second tank of 89 octane and it does seem to run better with better mileage over the 87 i was using .... but i am also still in the break-in period.

only 2999 miles so far.

i really like this car ... fun to drive.
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Old 05-01-2012, 11:02 AM   #133
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Oddly enough the last time I went with 92 instead of 87 my mileage plummeted
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Old 05-01-2012, 11:07 AM   #134
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I just put in 93 yesterday to try it. Felt good. I think I will give it a couple tanks to see mileage/performance differences. Performance is going to be biased since I am installing my intake tonight
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Old 05-01-2012, 11:22 AM   #135
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If your engine is not knocking and/or pinging there will be no difference in using 87 Vs 93 octane. The only thing the higher octane would do is reduce a tendancy for pre-detonation (knocking/pinging). The engine is designed/engineered to use 87, anything more would be a waste of money.
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Old 05-01-2012, 11:39 AM   #136
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^^^ this is why there are multiple threads and arguments on this subject. I don't know if I buy it, so I'd figure i'd try it since gas has dropped quite a bit here.
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Old 05-01-2012, 12:17 PM   #137
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Quote:
Originally Posted by dan03833 View Post
If your engine is not knocking and/or pinging there will be no difference in using 87 Vs 93 octane. The only thing the higher octane would do is reduce a tendancy for pre-detonation (knocking/pinging). The engine is designed/engineered to use 87, anything more would be a waste of money.
So, you're saying that there's no way the ignition can advance more than what is required for 87 octane? I call BS. Even the owners manual states that higher octane will provide improved performance. The Focus wouldn't be a true FFV vehicle if it didn't have that ability.

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Old 05-01-2012, 12:35 PM   #138
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Quote:
Originally Posted by dan03833 View Post
If your engine is not knocking and/or pinging there will be no difference in using 87 Vs 93 octane. The only thing the higher octane would do is reduce a tendancy for pre-detonation (knocking/pinging). The engine is designed/engineered to use 87, anything more would be a waste of money.
Sam old argument never changes. Dozens say the same thing, while dozens of others say using Premium does make enough of a difference to buy it.
So what? who cares?
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Old 05-01-2012, 12:40 PM   #139
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With the 87/93 price gap closing around here, I run 93 (10% ethanol) to smooth out the engine at low speeds.

I haven't seen any mileage improvements but it does noticeably improve the ride around car parks and the like.
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Old 05-01-2012, 12:51 PM   #140
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Originally Posted by Elizabeth View Post
So what? who cares?
We do--those of us who are participating in the discussion. If you don't, then you can make the decision to not read or participate in any of the discussions about it.

It's that simple. If you don't like the radio station you're listening to, change the station. Isn't freedom of choice a great thing?
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