Gas, which one?

MZ DAIZY · 03-12-2020, 05:22 PM

Quote:

Originally Posted by BettyZ

As opposed to the other sauce that Arkansans leave on their cousin's backs?

Sent from my SM-G955U using Tapatalk

Well that certainly escalated quickly!

dave11 · 03-12-2020, 06:58 PM

Quote:

Originally Posted by ZoomZ

To say accurately what will happen with 87 Octane at grandma speeds, Id be a liar. I'm sure OAT, engine temps, water temp, all will be a factor.

Please correct me if I'm wrong.

IMHO if you are going to drive at Grandma speeds, and I am 75, why did you even buy a Z? My Z has never had anything but highest octane Shell I can find.

ZoomZ · 03-12-2020, 09:18 PM

Quote:

Originally Posted by dave11

IMHO if you are going to drive at Grandma speeds, and I am 75, why did you even buy a Z? My Z has never had anything but highest octane Shell I can find.

I was referring to the OP. He/she stated they will drive Normal..

Don't worry, I'm driving it like a Z.

vtec to vvel · 03-12-2020, 09:48 PM

Quote:

Originally Posted by dave11

IMHO if you are going to drive at Grandma speeds, and I am 75, why did you even buy a Z? My Z has never had anything but highest octane Shell I can find.

I drive at "grandma speeds". You're from the Tampa area, and you know how many idiot drivers, not to mention uninsured drivers (I believe FL leads the nation in this category if I'm not mistaken), we have in this general area. Then, we also have sh!tty roads for the most part - aside from being the lightning capital of the world, we're also the pothole capital.

I so much as downshift, then some ricer civic thinks a race is on. So by me driving slow, they get impatient/pissed and drive off.

Spooler · 03-12-2020, 10:59 PM

Quote:

Originally Posted by MZ DAIZY

Well that certainly escalated quickly!

You gotta think who is posting it. It's that Lady again....

Spooler · 03-12-2020, 11:03 PM

Quote:

Originally Posted by ZoomZ

My understanding of NORTH AMERICA octane rating or AKI:

1). 87 octane and 94 octane have the same burn ENERGY. Meaning, you are not magically gaining HP or saving fuel. They have the same amount of stored energy.

3). The 370z ECU is smart enough to figure all this out if it gets a signal from the Knock sensor (not sure if its smart enough to understand the severity of the ping) and adjust timing accordingly.

Please correct me if I'm wrong.

OK, no you don't gain more HP by running 93 oct via the fuel. You get the extra HP because the ECU will run more timing in the motor. More power and better fuel economy is the result.

Rusty · 03-12-2020, 11:12 PM

Quote:

Originally Posted by vtec to vvel

Can these be bought at Home Depot?

On-line. We sell just about everything.

Rusty · 03-12-2020, 11:15 PM

Quote:

Originally Posted by MZ DAIZY

Well that certainly escalated quickly!

He ALWAYS takes things to the next level.

I didn't say if it's up a level, or down a level.

Rusty · 03-12-2020, 11:24 PM

Quote:

Originally Posted by ZoomZ

My understanding of NORTH AMERICA octane rating or AKI:

1). 87 octane and 94 octane have the same burn ENERGY. Meaning, you are not magically gaining HP or saving fuel. They have the same amount of stored energy.

2). Difference as octane number increases, is the additives that make that particular higher number BURN at a slower rate. In otherwords, igniting 94 octane is slowed vs 87. This is why relatively Higher compression engines, like 370Z ,require Minimum 91 in order to prevent detonation/pre-ignition due to heat and not during spark event.
91 is what Nissan engineers came up with after multitudes of tests.

3). The 370z ECU is smart enough to figure all this out if it gets a signal from the Knock sensor (not sure if its smart enough to understand the severity of the ping) and adjust timing accordingly.

To say accurately what will happen with 87 Octane at grandma speeds, Id be a liar. I'm sure OAT, engine temps, water temp, all will be a factor.

I would at least go to 89 octane minimum. I don't screw around, for .05c/litre more over 91, I use Chevron 94 which is Ethanol free. All 91 have ethanol here with the exception of Shell. (I'm west coast Canada)

Nothing wrong with Ethanol and modern cars. The rubber components are made as such. As long as you are driving with it and tank is continuously re-filled. DONT store with Ethanol gas!! I'm spring/ summer only and I store rest of time.

Please correct me if I'm wrong.

Back in the 60's, when Honda first got into Motorcycle GP racing. They had 2 cylinder 50cc bikes, 125cc 5 cylinder bikes and 250 and 350 6 cylinder bikes. All rev'ed to 20,000 rpm and over, and had a CR of 14 to 1. Honda found out that high octane race gas (110 +) would not burn fast enough to make the power they wanted. They ended up with a special blend of race gas with the octane in the high 70's to low 80's. This was the only fuels that would burn fast enough at those rpm's.

Zezus · 03-13-2020, 08:43 AM

I just feed dollars directly into my tank. Works way better.

MZ DAIZY · 03-13-2020, 09:59 AM

Quote:

Originally Posted by Rusty

He ALWAYS takes things to the next level.

I didn't say if it's up a level, or down a level.

No need to state the obvious...

SouthArk370Z · 03-13-2020, 10:07 AM

Quote:

Originally Posted by MZ DAIZY

No need to state the obvious...

Yeah, but we do it anyway.

03-13-2020, 08:43 AM	#55 (permalink)
Zezus Enthusiast Member Join Date: Dec 2018 Location: Cincinnati Posts: 354 Drives: 2016 370z sport 6spd Rep Power: 50338	I just feed dollars directly into my tank. Works way better. -ZS-Carpenter and bunk like this.