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Old 02-05-2004, 07:39 PM   #1
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fuel octane

I know the owners manual states you must use 91 octane, but has anyone tried less than this? 91 octane is almost $2.00 a gallon here.


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Old 02-05-2004, 07:57 PM   #2
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The car will prolly run like poo if you use less than 91 in a svtf.
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Old 02-05-2004, 09:23 PM   #3
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Dang! Gas is pretty high for where u live .. its climbing up here to i used to buy just mobil now i drive to sheetz or wawa which is about 1.63.. i haven't tried anything less than 91 don't wanna mess anything up.
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Old 02-05-2004, 10:07 PM   #4
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one time the 91 octane pump was broken and i only had a chevron card no money so i put it medium it ran ok but im sure it wasn't great for my engine
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Old 02-06-2004, 01:13 PM   #5
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nah man you really can tell the difference when you use regular gas. My cousin put in 87 octane into his svt focus and it ran wierd like as if surging and bogging down. I dont recomend using cheap gas man even if is cheaper. If you have to use the cheap gas put in some octane booster to pick it up
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Old 02-06-2004, 05:02 PM   #6
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Quote:
Originally posted by Svt4life
Dang! Gas is pretty high for where u live .. its climbing up here to i used to buy just mobil now i drive to sheetz or wawa which is about 1.63.. i haven't tried anything less than 91 don't wanna mess anything up.
It's $1.85 here right now, and that's probably the lowest I've seen in over a year.
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Old 02-06-2004, 05:23 PM   #7
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Hmm, I was told that 91 octane was required for the SVT, but 87 for everything else. The manual says for my car, don't use anything over or under 87.
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Old 02-06-2004, 05:34 PM   #8
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Sorry but I've only ever used 93, nothing more, nothing less. With the SVTF being such a high compression motor, I dont want to run a risk of messing anything up by using anything less than required.

Just a thought, I dont know if anybody else's service dept do this, but mine will check the fuel to make sure its what octane is required.

Right now premium gas here is $1.70, regular is $1.50 per gallon.
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Old 02-06-2004, 09:58 PM   #9
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With using a lower octane gas, you COULD develop a knock in the engine. Thata is the only reasoning behind that. They required it for my SVT Contour but I started to put in 89 and got around fine for about 3 months. Then started the knock that lead to the demise of my babby! She died at 40K! "Thank god for warranties and the lemon law." I waited and got the SVT Focus and havent put less than 91 in because I dont want the heart break and loss of pocket change!
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Old 02-07-2004, 04:08 AM   #10
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I wouldnt use less then 91 like the car says. Besides is saving $2.00 a tank really worth possibly damaging your car? And here in SE WI premium is around $1.80-85 and regular is around $1.67, not a huge difference when you think about it.
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