In Maryland you have the norm of 93 octane and occasionally you can find 94 (sunoco i believe). I am currently in europe for another 2 weeks and I have noticed that they have 95, 98, and 100 octane... My question is.... I put down 248whp corrected on 93 octane....how much would I put down roughly on 100 octane and 110 octane??? I searched and didnt find anything helpful on this matter. thanks in advance...

 

In Europe, 95 octane is closer to 89, 98 equals 91, and 100 equals 92/93. In the US we do an average of RON and MON methods. In Europe and Japan they only use RON hence the reason for higher octane numbers even though the octane is really about the same.

He said, Sport Compact magazine did a test on their 350Z and they found that with Z made about 8whp/wtq more with 100 octane vs 91 octane. I'm convinced the stock ECU can take advantage of the higher octane, to a degree.

 

You probably know that the higher octane gas doesn't have more energy and by itself, doesn't produce more power.

The difference comes from the way the ECU runs the engine. Higher octane will allow the engine to run at the maximum timing efficiency, within the limits of the ECU or other management system in use. When the ECU detects knock (the lower the octane, the more prone it is to knocking), it instantly pulls timing and output power drops. You have probably noticed that the car seems to have more power at some times than others. When it is very hot or the engine is heat soaked, the ECU is retarding timing (to eliminate knock and detonation) to protect the engine and it is not as fast as when cruising on a nice, cool day.

 

More important than octane [assuming ecu can retard enough] is the BTU of the fuel..........Compared to 1990 our gasoline has had a steady decline from the 125,000 BTU per gallon due to emissions, carcinogens, and cost containment.

When they removed Benzene and lowered aromatic content and added ethanol they significantly watered down the current product called gasoline.

Many are lucky to find 110,000 BTU product today.

Research how BTU controls BMEP and how that effects torque output.

The high octane racing fuels have much higher BTU than pump gasoline that is the main source of increased power output not the octane.

 

Although I haven't searched, is there an efficient way to compare the BTU output of today's brands, e.g. Sunoco vs Mobil vs BP, etc. or are they all similar?

 

Sharif has mentioned over on my350z that even with a proper tune, there's just not much power left even with higher octane fuels. I don't remember the exact thread, but I believehe was experimenting all the way up to C16...

I tend to believe Sharif. He could tell me he shat gold and I'd believe him.

 

thanks guys...understood now...

 

try using 110. it is great for the engine and cleans it out

 

i might be getting a dyno soon, if i do, this is the kinda experiments i want to try out, i will put a few gallons of 93 octance, then drain it and put in 100 octane, i cant wait, i am even going to try out a turbonator!!!

 

Post me the result with Turbonator

 

THATS FUNNY!!!!!!! LMAO!!!!!

Why is this funny?... the first time me and you got into it out here (well over a year ago) was regarding octane level and how you insisted higher octane made ZERO difference.

Don’t make me dig up the thread! Not trying to pick a fight - but this is as close as it gets to what others have said about your waffling.

Don’t bother responding unless you want me to post the foolish bickering in that thread. BTW Trey and his wife were a big part of that thread too (at the time Cheryl was defending the lower octane with you due to budget constraints - in case that sparks a memory).

Just an observation - not a flame.

 

I guess you'll have to dig up the thread because, in most contexts, I've always argued that higher octane (to a degree) will most likely gain a few HP. Here's a post of mine from January 05, post #21:

https://g35driver.com/forums/showthr...ghlight=octane

More of the same from me:

https://g35driver.com/forums/showthr...ghlight=octane

 

Dave, Dave, Dave... Fortunate for you G35Driver only has posts from me as far back as Oct of 2005... but as anyone can see I've been a member since Nov of 2004... No I wasn’t lurking for over a year - it's your good fortune that there isn’t any recordable post of what I am referring to.

I KNOW you know what I am referring to. So do many others that you have contradicted yourself with.

So consider the fact that you saved face by default due to lack of server space as a blessing and don’t perpetuate the inevitable.... you know the people that have proven you wrong in the past don’t post here anymore (because of the drama)... but you also know you have said no mod results in performance and octane doesn’t matter... MANY veteran G35 Premier members know of your bogus rhetoric - so don't play stupid here.

If you aren’t aware of what I' am referring to then I apologize - I wasn’t aware that you are that old and potentially senile.

Now... if you are going to start posting RECENT posts of your contradictions... don't bother. You've already proven those of us that you use to debate with right. You are finally agreeing with what we (and you know how "we" are) have been saying.

Otherwise - leave this one alone!

 

Wow. I really don't know what in the world you're talking about when it comes to this so-called octane contradiction. It's really funny you bring up this call-out completely out of the blue just to start some drama especially with a post that doesn't apparently exist. I think you must be mistaking me with someone else you tangled with because I'd never make a higher octane argument when it comes to these VQ35s because I do know the knock sensors are quite sensitive. Hell, I constantly ran 92/100 octane mix in my 96 Maxima because it increased consistency at the track. Why would I argue about this? I could post threads from Maxima.org dating back to 2003 to support my claims.

Now if someone was trying to run 104+ and leaded fuel, then yes, I'd say don't waste your time. There comes a point when too much octane will slow the car down (for numerous reasons I won't go into) and leaded fuel will quickly foul the 02 sensors. Same goes for running 95-100 octane during normal driving. It's just not worth the expense.

It sures sounds to me like you've got a bone to pick with me and you're looking for any excuse to start something. BTW, I've NEVER said every mod available for these cars doesn't work. Hell, if that was the case then why do I have a MD spacer? You, ChicagoX, DaveO, G35TX, Earl, and posse absolutely love to twist my words. I tell you what, unless you can dig up this supposed octane post or ANY post that has me saying NO MODS WORK FOR THESE CARS, stop wasting my time. If you want to call me a liar then you had better have proof of my lying. Otherwise, go away.

 

I didn’t bother reading your post past the first sentence... "30 second rule"... All I can say is you are a LIAR and you know it... If you don’t know it you truly are senile and I forgive you. I have been posting since late 2004 and none until 10/05 are recorded - not because they didn’t appear but apparently because the server won’t go back that far... it's unfortunate for all the knowledgeable people that posted viable information about mods like Stillen Exhaust and CAI and 2003 TCU upgrades and ground wire improvements and thermal intake tubes... and most recently (from what I’ve gathered E-Fan conversions) and dyno results... etc.. etc.. etc...

All of which you have disputed INCLUDING my comment that "the higher the better" in a thread where someone was asking about the difference in octane... YOU and YOU alone told me (and everyone reading) that octane made no difference.

When you kept boasting about mods not working and how it is all about a driver... I challenged you to race. I had mods that have been proven and you insisted they weren't worth anything... It's funny that now you are posting in threads about E-Manage units to tune mods... you even stated that "you've been waiting a long time" for a certain product.... And you don’t even think mods are worthwhile! Oh... but you've been adding some... You are a real piece of work.

You DaveB are a FLAT OUT LIAR!!!! I am done with this post - and your BS!

Anyone else reading this post - wait 6 months and DaveB's "perspective" here will be contradicted by his "new" view... it has happened and if you take a poll of people that have been out here for any period of time they will agree.

Damn it... I broke the 30-second rule all to hell!!!! If you are new to this forum - read the viable information regarding performance mods and you will see how DaveB spews his BS... that's where the "30 second rule" thing started. Very knowledgeable people got tired of doing what I am now with this nonsense.