can you use reg unleaded in new 06 civic si?
I just burnt my tongue
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you can but your gonna have a lot of engine problems...because of the high compression (11.1:1 i beleive) you need a higher octane gas which is harder to burn...when compression gets to higher levels there is a lot more heat produced and with lower octane gas which is meant for easy combustion (the higher the octane the harder to burn) will cause it to pre-ignite or pre-detonate because of the heat...(funny how we pay more for gas thats harder to burn) thats the main reason why diesel engines dont need spark plugs because they are at tremendously high compressions but the rpms only go up to 4000 or so
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Originally Posted by AlienX
no it is not safe, run what the manual says and stop complaining!
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running high quality gas is a price you pay for a high performance car. i will also tell you that if you hate high gas prices call your local airport and ask them how much 100 low lead is, its about 3.70 a gal here
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no. Like the RSX type S. You must use at least Premium unleaded 91 octane. You WILL run into engine problems if you dont. And yes, the Civic Si IS a sports car. In the regular civics you can use regular unleaded 87. However with the Si MUST use at least 91 octane. The compression is very high.
no. Like the RSX type S. You must use at least Premium unleaded 91 octane. You WILL run into engine problems if you dont. And yes, the Civic Si IS a sports car. In the regular civics you can use regular unleaded 87. However with the Si MUST use at least 91 octane. The compression is very high.
Last edited by jhonsok; Dec 30, 2005 at 08:55 PM.
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Rep Power: 424 If you use 87 it'll knock like crazy hell.
If you use 89 it'll run, but run like crap.
If you use 91 or more like it says, the car will run happy and last a while.
Its a 14ish gallon tank. So its less than 3 bucks a tank. You're buying a 21K car that still gets 30MPG. Do the math. If you can't afford the gas, don't bother with the car. Leave it for someone who's gonna take care of it.
If you use 89 it'll run, but run like crap.
If you use 91 or more like it says, the car will run happy and last a while.
Its a 14ish gallon tank. So its less than 3 bucks a tank. You're buying a 21K car that still gets 30MPG. Do the math. If you can't afford the gas, don't bother with the car. Leave it for someone who's gonna take care of it.
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Rep Power: 339 most higher performance cars require 91 and up.... I would assume ppl who can afford to pay off an Si in full can afford gas for it.... the gas milleage isnt horrible on it anyhow..... but if you cant pay up, dont play the game.
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Originally Posted by Boilermaker1
If you use 87 it'll knock like crazy hell.
If you use 89 it'll run, but run like crap.
If you use 91 or more like it says, the car will run happy and last a while.
Its a 14ish gallon tank. So its less than 3 bucks a tank. You're buying a 21K car that still gets 30MPG. Do the math. If you can't afford the gas, don't bother with the car. Leave it for someone who's gonna take care of it.
If you use 89 it'll run, but run like crap.
If you use 91 or more like it says, the car will run happy and last a while.
Its a 14ish gallon tank. So its less than 3 bucks a tank. You're buying a 21K car that still gets 30MPG. Do the math. If you can't afford the gas, don't bother with the car. Leave it for someone who's gonna take care of it.
everyone that has posted is telling the truth and on the dot. The engine require the octance because of the compressions, so give the engine what it wants.
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Rep Power: 0 thanks , I really appreciate this ya'll, the dealer here would never even mention this, I thought of it (as I thought of my payments for the si!- my civic is paid off that I have now!), so, I put a $500 deposit down, which is refundable, but I may have to get my $ back. I love how my civic takes reg unleaded and gets 40 mpg on highway trips!
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