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Which octane rating?

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  #1  
Old 02-26-2006, 01:25 AM
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Default Which octane rating?

I was just curious if I swap upto a B16a2 or a B18C if I have to start using premium fuel?
 
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Old 02-26-2006, 03:09 PM
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Default RE: Which octane rating?

Yeah, I think so due to the compression.

You could retard the timming and run lower octane but then people might question if your brain is 8* behind TDC too.
 
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Old 02-26-2006, 06:37 PM
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Default RE: Which octane rating?

i have a 99 si, and in the owners manual it says for the si (b16a2) premium fuel, ive never ran anything else so i cant tell u the difference, but yes run premium
 
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