My fuel options for my ordered 2008 LS3 are 87 octane, 89 octane with 10% ethanol, or 91 octane premium. I understand 91 octane is in the manual, but can I run any of those without causing problems?
Close- the engine computer pulls (retards) timing to protect from knocking. You lose power when this happens, but nothing will break. We're talking losing in the 50 hp range, maybe more.Always 91 for me.
An anti-knock in the engine essentially detunes the engine to correct the compression ratio with the octane correct?
Yup. :agree: Altitude where the gas is being sold also plays a major factor. Octane rating will be lower at higher altitude (because the engine anti-knock needs are reduced due to less O2 available, etc.)i only put 93 in every sports car i have had ..its just not worth the risk of having engine knock to me
and for those who dont know.....The octane rating of gasoline marked "premium" or "regular" is not consistent across the country. One state may require a minimum octane rating of 92 for all premium gasoline, while another may allow 90 octane to be called premium. To make sure you know what you're buying, check the octane rating on the yellow sticker on the gas pump instead of relying on the name "premium" or "regular."
yes that is a good idea and should be used if you are not going to be around 92-93 octane for a while...i am kinda shocked at how many people use 91...i thought it would be the complete oppositei know i will probably get yelled at for suggesting this, i don't know what would be the long term affects but what if you stocked up on some octane booster and added enough to get it to the 91 rating, it would be an extra step when you filled up but you would have the octane you need.