running 89 octane instead of 87 in a SBC??
08-26-2008, 09:40 PM
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running 89 octane instead of 87 in a SBC?? My daily driver is a '91 caprice with a 305 and always run 87. I found a few places where I go to school where 89 octane is 10 cents cheaper per gallon than 87 octane. I have to go back to the stations to see if either the 87 or 89 octane gas contains 10% ethanol which would mean a MPG difference.
If I use the 89 octane for few months while away at school then switch back to 87 when home in Chicago will it be bad for the car? Will the engine get adjusted to the 89 and then possibly run bad when it goes back to 87? Should I just pay the extra $$ and get 87? Thanks!!
If I use the 89 octane for few months while away at school then switch back to 87 when home in Chicago will it be bad for the car? Will the engine get adjusted to the 89 and then possibly run bad when it goes back to 87? Should I just pay the extra $$ and get 87? Thanks!!
08-27-2008, 08:10 AM
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but from the sounds of it, he prolly shouldn't mess with the distributor... if you dont know what your doing you'll have a car seriously down on power, or pinging like a ****
08-27-2008, 10:14 AM
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read this for 87 vs 89 octane:
http://en.wikipedia.org/wiki/Octane_rating
read this for 10% ethanol:
http://en.wikipedia.org/wiki/Ethanol_fuel
read this for reformulated and oxygenated fuel economy:
http://www.epa.gov/orcdizux/rfgecon.htm
it doesn't matter what octane you use, as long as you get the minimum required. 10% ethanol shouldn't affect your gas mileage enough for you to notice.
http://en.wikipedia.org/wiki/Octane_rating
read this for 10% ethanol:
http://en.wikipedia.org/wiki/Ethanol_fuel
read this for reformulated and oxygenated fuel economy:
http://www.epa.gov/orcdizux/rfgecon.htm
it doesn't matter what octane you use, as long as you get the minimum required. 10% ethanol shouldn't affect your gas mileage enough for you to notice.
08-27-2008, 01:20 PM
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read this for 87 vs 89 octane:
http://en.wikipedia.org/wiki/Octane_rating
read this for 10% ethanol:
http://en.wikipedia.org/wiki/Ethanol_fuel
read this for reformulated and oxygenated fuel economy:
http://www.epa.gov/orcdizux/rfgecon.htm
it doesn't matter what octane you use, as long as you get the minimum required. 10% ethanol shouldn't affect your gas mileage enough for you to notice.
http://en.wikipedia.org/wiki/Octane_rating
read this for 10% ethanol:
http://en.wikipedia.org/wiki/Ethanol_fuel
read this for reformulated and oxygenated fuel economy:
http://www.epa.gov/orcdizux/rfgecon.htm
it doesn't matter what octane you use, as long as you get the minimum required. 10% ethanol shouldn't affect your gas mileage enough for you to notice.
08-27-2008, 02:24 PM
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Staging Lane
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i get around 28mpg when i baby it and around 24mpg when i do the opposite. always have.
http://www.gassavers.org/garage/viewgaslog/1530 (<-- i just started keeping track)
indiana doesn't require e10 labels on gas pumps (i think all pumps are e10 - i don't remember when they changed). don't get me wrong, i don't support e10. i just don't experience problems with it.
Last edited by checkbit; 08-27-2008 at 03:07 PM.
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08-27-2008, 06:55 PM
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well while i dont experience problems with it, it does kill gas mileage. alcohol is a less efficient fuel so it takes more of it to do what gasoline does. the effects of e85 are 10 times worse.
08-28-2008, 02:12 PM
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no problem 
http://www.fquick.com/406malibu theres a page with some pics, it looks slightly different now, and it no longer has a 406, and it has a cowl hood. here's a vid with a pic of its current look. its the second car http://www.youtube.com/watch?v=FK14ZgbwkKQ
http://www.fquick.com/406malibu theres a page with some pics, it looks slightly different now, and it no longer has a 406, and it has a cowl hood. here's a vid with a pic of its current look. its the second car http://www.youtube.com/watch?v=FK14ZgbwkKQ
