Running 87oct in my Turbo'd GSX

[JustROLLIN]

Heres the thing... On ANY car with a knock sensor you can make up the cost difference when running premium gas. The ECU will advance timing until it sees knock, regardless of throttle position, except for WOT. As the ECU sees knock, it will pull the timing back and do it all over again. The ECU is designed to drive the car on the very edge of knocking for high efficiency. So, when running the 87 you are losing the MPG and in turn using nearly as much money, if not more. Not too mention, you can use the thousands of dollars of high performance goodies you bought for the car. So, logic dictates once again. Using 92 will not only allow you to push the pedal through the floor, but also net a better economic position when you arent into it.

[Kracka]

Shit kids, even my VTEC is getting premium no matter the cost. I bought a performance car for a reason, might as well enjoy it. If I have to pay an extra 15 cents per 25 miles I drive then so be it. Jesus, people complain about having to pay $2.50 to drive 25 miles, but $4 for a 10oz coffee is no big deal. In reality, filling up with premium over regular is about an additional $2 per tank...skip the candy bar and pop and you're kosher.

[JustROLLIN]

Well said Chris. When I had my Talon I went through the same thought process as you apparently. Honestly, what is 2 bucks per fill compared to the happiness of boosting when you want to.

[IndiEP]

Even if you were to unhook your wastegate flapper and run 87, w/such low compression and what Justrollin said about the ECU, that thing is gonna be a dog around town.

[Emcee gsxtc]

Well here's the solution to my gas mileage.

[JET]

Emcee, we will have to go riding sometime! Do you have your bike yet? My buddy has a 03 ZX6RR. It is a really nice bike. I am sure you will be happy with it.

[Shane@DBPerformance]

Heres the thing... On ANY car with a knock sensor you can make up the cost difference when running premium gas. The ECU will advance timing until it sees knock, regardless of throttle position, except for WOT. As the ECU sees knock, it will pull the timing back and do it all over again. The ECU is designed to drive the car on the very edge of knocking for high efficiency. So, when running the 87 you are losing the MPG and in turn using nearly as much money, if not more. Not too mention, you can use the thousands of dollars of high performance goodies you bought for the car. So, logic dictates once again. Using 92 will not only allow you to push the pedal through the floor, but also net a better economic position when you arent into it.

That is not true. Most knock sensor equipped cars do not tune themselves based off of knock. DSMs run off of hardcoded timing tables, it will retard timing when it sees knock, but it will not run more timing than what is in the tables on its own.

[Onefast99gsx]

In times like these you gotta wonder if the 92oct that you're pumping is actually 92. I mean, how can you tell? I gotta wonder if anyone in my neighborhood has actually been buying much 92. If no one is buying it, then it sits around and probably isn't as good as what you should be getting anyway.

[JustROLLIN]

That is not true. Most knock sensor equipped cars do not tune themselves based off of knock. DSMs run off of hardcoded timing tables, it will retard timing when it sees knock, but it will not run more timing than what is in the tables on its own.

When you say "most" remember the fact that DSMs are not "most" cars. I was unaware that DSMs will not push that ragged edge, but I can assure you that "most" cars do in fact run like this. Granted DSMs are a different breed seeing as they are turbo-charged. But, cars equipped with knock sensors do in fact push the limit in the name of gas mileage.

[MATCHBX]

Yeah, the 30-something mpg on 87 is awesome!!!! I'm almost having second thoughts about putting the talon back together. It's amazing how much that CRX keeps saving me. Even with 220,000+ miles on it.

I am very tempted to get a bike this year as well. I only have a 10 minute drive to work on backstreets.