Over the counter octane boosters raise your octane by one point. That'* POINT one, or 0.1 octane per application. That'* too expensive. Better off buying the higher octane fuel to begin with.

sorry to sound like an idiot...but what exactaly is KR?

Thanks, i know its a stupid question

bash it all u want...but my mom runs 89 in her 97 ssei all the time...had the car for over 2 years now... no problems

Knock retard. When the combustion process starts early (ie. too far before the piston is at top dead center) the pressure peaks before top dead center and kills power and possible after enough stress, the piston or entire engine. The PCM senses knock through a knock sensor, retards timing to cool off the chamber a bit so the fuel/air mixture will ignite at a safer time. However, it usually retards it farther than is necessary to reduce the possibility of knock reoccuring quickly.

For the last year I have been running the lowest price gas I could find. Lately and for now on I am running premium. I do notice alot of good including better mileage. I don't have an autotap, but it would be nice to see the readouts running the different grades of gas. In minnesota we have 10% ethenol in our cheap gas, I wonder it that helps cheap gas out a bit, meaning maybe it'* not as bad as plain cheap gas.

And I gaurantee she has KR and doesn't even know it.

I had an issue a few summers back when i went to a full serve gas station the jackass put regualar gas in my car when i told him to fill it with supreme. I thought i killed my bonnie, it ran like garbage about 30 minutes of driving, i had to get the tank removed and emptied and refilled with supreme, cost me $500, ill never get a full serve gas station after that!

I admit the error of my ways. It'* just that in my 2000 Chevy pickup I have run it all. Nothing really changes. Being a SC newbie I looked in the book.

The good book states that with the SC you can may use middle grade or regular unleaded gasolines, but your vehicle may not accelerate as well. blah blah blah... If the octane is less than 87, you may get a heavy knocking noise when you drive. If it'* bad enough, it can damage your engine.

I am giving my baby a full tank of the best stuff to put me in the poor house and check the power and mileage. You guys have a point that if your mileage is that much better, then it'* costing less to run premium. (and you've got that extra POWER!!!, which I want)

here in jersey full service is the law so other ppl always pump ur gas.....almost had an incident similar today....handed the guy my card & my key and said clearly: "fill it up premium" he said "fill it?" i said "yes"....then something told me to watch the guy.... and i did... and sure enough he hit the 87 button and almost put the nozzle in my car......i almost jumped outta my driver'* window..........

The 10%E might give you a HAIR less HP, but thats one reason our gas is cheaper then damn near the rest of the country. MSU is a HUGE E85 testbed, and i think it'* a neat usable technology. I really hope they go to 20% here like they're looking at at the capitol.