110 Octane

[GaryE30]

I stopped at a "Pumpers" Gas station on the way back from Charlotte this past weekend and they had a 110 octane race fuel. It said for off-road use only. Just wondering, what would it do if it were put into a vehicle like ours? I'm sure some adjustments would need to be made before fueling. Seemed pretty interesting.

[Hatchman]

price per gallon?

[Jordan]

It won't do anything to a car like ours.

No knock sensors, and no adaptivity to take advantage of it.

Newer cars are able to detect the fuel grade, and adjust spark and fuel timing for optimum output. Turbo cars will see a good amount of increase with such fuel.

But again, putting it in your m20 will make no difference.

[87 325iS]

110 octane is leaded.

[permit]

Wait, my post made no sense! Go me.

[AdironRider]

Its 4.89 a few towns over by the dragway up here in NH

[87 325iS]

The highest octane unleaded gas is 103.

[Rob]

What jordan said, for the most part.

[Charlie]

Re: 110 Octane

I stopped at a "Pumpers" Gas station on the way back from Charlotte this past weekend and they had a 110 octane race fuel. It said for off-road use only. Just wondering, what would it do if it were put into a vehicle like ours? I'm sure some adjustments would need to be made before fueling. Seemed pretty interesting.

It would thrash your O2 sensor and clog your cat, other than that, not much on a standard m20 motor.

I've run the 100 octane unleaded stuff occasionally at the track on hot days, in 95+ degree weather, it definetly takes out some of the pinging.

-Charlie

[herragge]

yeah the high octane stuff with lead in it increases the octane rating but in turn negates the effect of the catalytic converter so you'll get more CO emissions and NOX. They aren't great for the o2 sensors either as the particles of lead will coat them and prevent them from working efficiently.

But that isn't new to many people. ;)

[M42Technik]

Found 98 at a gas station in Northeastern Maryland at the tip of the Chesapeake, apparently near a drag strip.

$6.90 a gallon...

[EtaSport]

Our local sheetz 3 miles from the drit track sold 100 octane for about two weeks. 5.50 a gallon. Of course I had no interest, but one of my turbo friends was making use of it. Too bad he was stock and only boosting 10psi. We have another station that sells 116 cam2 for around 4.75. I ran it in my snowmobile once when I used to race.

Lower fuel octane will burn cleaner, although it will burn hotter and cause the pinging. You should only run enough octane to eliminate any valve ping, unless of course, turbo, high compression or towing purposes. I'm happy still running 87 in the hybrid.

[GaryE30]

Price was $4.59 or so. Yeah, kinda rediculous, just the first time I've ever seen it on public streets.

[Ryan Stewart]

octane is a rating of resistance to ignition so putting it in your engine would actually make it run a lot less efficient along with all the problems noted by everyone else.

Its only really useful if you are running an incredibly high compression or boost where the risk of detonation is high. Like Charlie said it can be useful in small amounts in certain situations.

I was getting a bit of knocking on the S50 on 105 days on the track so I mixed in about 1.4 tank of 100 low-lead to just bring up my 91 a bit. A little bit of lead wont hurt, in fact it is there to protect the valves. Its just a lot building up that ruins sensors and cats.