94 octane Petro

[Death2Theft]

No it's not she's just a basemodel poser.

Originally Posted by shenmecar

well your Z is turbocharged

i put midgrade in my mdx and its fine

[HollyZ32]

Originally Posted by Death2Theft

No it's not she's just a basemodel poser.

Haha ouch psh so lol it does the job for now haha
im working my way up to a TT fairlady
im getting there lol

[Rikaro]

thank god for this post. I was getting dumber every post I read down

Originally Posted by Lomac

Kinda... Here's the Coles Notes of it:

If your car states that it "Requires Regular unleaded", you're fine putting in 87. If it "Requires Premium," your minimum octane is 91. If it "Recommends Premium," you can put in Regular as the car will adjust the timing to prevent detonation, though at a possible loss of horsepower and/or fuel consumption.

Conversely, putting 94 octane into an engine that only requires 91 or less can also have an adverse effect. Higher octane means a higher detonation point. An engine that is designed to run on a lower octane needs to run hotter in order to try to burn the higher octane. As a result, you end up with hotter engine temperatures, more unburnt fuel going through your exhaust (which will lead to a premature death on your cats), and worse fuel mileage.

The only reasons why you would put higher octane into your engine than what the manufacturer recommends is if you've modified it in such a way that you have higher compression, and/or are running some type of forced induction.

[Iceman-19]

Originally Posted by Rikaro

thank god for this post. I was getting dumber every post I read down

Yeah, up until that post, every post holly made, I was slowly loading the pistol, cocking it, and bringing it up to my chin, then lomac saved my life.

[Corey Darling]

.

[Lomac]

Originally Posted by Iceman-19

First part is bang on, 2nd part, not so much. You can run whatever fuel you want as long as it is above the minimum the engine requires. Running 94 octane on a vehicle that requires 86/87 isnt going to not burn the fuel, it will still burn it, as it will only inject what it needs into the cylinder. It will just take a longer time to burn, so the burn will not be as complete. If you have OBDII, the car may adjust for this, adjusting injector pulse width, plug firing times, timing, etc. It may just run like a bag of ass. Unless you vehicles REQUIRES a certain minimum (i.e. 91/94), or its boosted or very high compression, run 87.

See, that's what logic should dictate; however, whenever I've tried running 93/94 in place of 91, both my water and manifold temperatures jump up by a minimum of 5 degrees, but will usually run 10 points higher than normal when I start pushing the car.

[Iceman-19]

Thats strange. I run 94 all the time on my Probe.

[HollyZ32]

OK SO
i know this is like WAY off topic
but....
i have HID headlight in my car
is it normal then when im in park and the car is on and then i turn the lights on
my idle on my car goes down?
like as soon as i turn them down my idle drops!

[Iceman-19]

A. totally wrong forum
B. its the alternator cranking on
C. if you're hot, can i do you?

[Death2Theft]

Kinda like when i show you a mcdonalds pie and your pants drop?

[pandalove]

Shell gas only goes up to 91 V power... and they say the develope with ferarri ... but doesn't ferarri cars require 95octane?... am i missing something here?

[MWR34]

I have a Fairlady, (300zx From Japan) dyno'd over 700RWHP, and I run 94 octane for street driving. Toluene 30% mix for the track @ higher boost levels.

please, 91 is fine. 94 will be worse for a non-turbo car.



-Martin


and yes, its your alternator working hard to keep your system charging fine. it puts a load on the alternator belt, which also is connected to other belts and the ECU. try adding interior lights, A/C on MAX, hazards.. they all will make the Idle change if there is too many things on at once and it overloads or overworks your alternator at that given moment

[Bonka]

Originally Posted by pandalove

Shell gas only goes up to 91 V power... and they say the develope with ferarri ... but doesn't ferarri cars require 95octane?... am i missing something here?

95 is likely the RON rating (Europe), which would be 91 octane (RON+MON/2) in North America.

Speaking of Shell, what's the point of having 2 nozzles for 91?

[pandalove]

Originally Posted by Bonka

95 is likely the RON rating (Europe), which would be 91 octane (RON+MON/2) in North America.

Speaking of Shell, what's the point of having 2 nozzles for 91?

i think it is ppl sometimes prefer using the only nozzle for 91 so it doesn't get contaminated with other octane grades?

[jlenko]

There are a few cars out there that WILL see improved performance from using a higher octane... say, the factory timing for 87 octane is knocked back a bit, and the manufacturer actually has enough tune in there, so if you're running, say, 89 octane... it will advance the timing a bit more to make a little bit more power.

BUT the cost of the higher octane vs the minute amount of difference you'll ever see there - not worth it!

[Iceman-19]

Originally Posted by jlenko

There are a few cars out there that WILL see improved performance from using a higher octane... say, the factory timing for 87 octane is knocked back a bit, and the manufacturer actually has enough tune in there, so if you're running, say, 89 octane... it will advance the timing a bit more to make a little bit more power.

BUT the cost of the higher octane vs the minute amount of difference you'll ever see there - not worth it!

What he is talking about is OBDII cars with a knock sensor, the ECU will adjust timing to the MAXIMUM it can run without a knock or a ping.

[jack_dangerous]

ya... like the new genesis... 10hp difference between regular and premium gas