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iTrader: (1)

Okay, than continue on with your 87 crap and tell me how the car runs in 2-3 years! if you know everything already

seinsmeld13

All these comments over a tank of gas? If your concerned and I wouldn't be put in some octane booster as recommended by the other post.

986Jim

Again super advice. The car is 5 years old now and has been on 87 the whole time and it's fine. Feel free to waste your money on 91 if you want and fill up this message board with useless and incorrect information, let me know how that goes in two years.

Do you realize that 107+ octane booster boost's octane by 7 points which means 0.7. So that turns your 87 octane into 87.7. So basically there is no point in bothering with this.

It would have to boost it by 40 points to get to 91 which means you would have to add 6 bottles of it. Google octane booster for more info on it. MMT which is the additive in most octane boosters is really hard on injectors and sensors and running too much of it will shorten their life a lot. They are all snake oil. If you watch Top Gear and Fifth Gear from the UK in season 5 Fifth Gear did a dyno on all the different octane boosters on a turbocharged car and they all caused the car to lose power.

Higher octane has LESS BTU so you get less gas mileage on higher octane gas then you do on lower octane. So running 94 in a car that should have 91 will actually give you lower overall gas mileage and no additional power due to the lower BTU value of the higher octane gasoline.

Unless your car has a larger turbo and pushing a lot of boost (say 35lbs/min wheel, like a GT28RS etc) you shouldn't run higher octane cause your waisting money and getting worse gas mileage than you should be.

Regards,