S Mode and mileage difference on/off

cjwsrt6

Has anyone noticed a difference in mileage driving with your S mode on or off? I would think that with it off you would get a little better mileage but probably not much.. anyone run the numbers?

6MT-Z34

idk if you will notice a difference but if you are worried about mpg this might not be the best car for you lol

Chuck33079

Nope. Not going to be something you can measure. Considering all S mode does is automate the rev-matching you do anyway, I'm not sure there would be any measurable difference.

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cjwsrt6

I already own a z I was just wondering about it earlier and figured I'd ask. Thanks for the quick replies, maybe I'll check it next fill up and see

Bking

You can do a quick test on it.

1. Fill up your tank to max
2. Drive for 50 miles normally in S mode. Fill up and see how many gallons you used
3. Drive for 50 miles normally without S mode. Do the same step 2.

Personally I find using the S mode will decrease the mileage, but it really depends on if you do a manual rev-match when you downshift or not.

Mt Tam I am

Shifts at 6000 -7000 rpm's tend to be bad mileage no matter how you slice it.

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DOOMMONKEY777

S-mode keeps ur rpm above 2k even when ur in neutral. I can see a slight gpm drop.

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aszyd

The words, they make no sense.

Please elaborate, because I can recount numerous times that my car has dipped below 2K. My daily cruise to work, when I pop it into neutral coming off on an off-ramp, sitting in traffic, etc. I never turn synchro-rev off because I am a pansy who can't heal-toe.

The only way I could see it using less fuel is if you are a master of the manual transmission and can get every downshift perfect. I'm sure there are people out there who can do it. Depending on the type of person reviewing the car, they either loved s-rev, or hated it, because they were better at it than the ECU.

To rev that quickly in all situations, it must have to dump quite a bit of fuel into the cylinders.

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sizziano

Well thats the beauty of S-Mode, you can turn it off.

DOOMMONKEY777

ok let me explain this to all of u. It is all on the driver on how far he/she likes to put their throttle down, but wile in S-mode it is fixed that the rpms dont go lover than 2000 for example: to an idle of base 650rpm, nismos 700rpm wile S-mode is off. idleing at 2000 rpms means u burn 14.7:1 A/F ratio @ 2000 rpm wile in S-mode rather than base 650rpm, nismos 700rpm wile S-mode is off.

Just for the record i dont drive with S-Mode i just know how it functions and i dont hate it just never found my self using it.

P.S. this car is tuned from the factory to give 14.7:1 a/f ratio till 3200rpm, wich causes torque loss in low rpms, after uprev tune i found it that the engine has much better response when u start 13.7:1 a/f ratio @ 2000rpm.

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Haboob

What?

No, SRM does not keep your car from dipping below 2,000 RPM.

Push370zzz

You have to be joking right, how would rev matching affect gas mileage in any sort of noticeable way?

The answer is NO, you will not notice any difference. Any perceived difference will be due to how you may DRIVE with it on or off.

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cjwsrt6

Why would I be joking, it was a question, that is what this forum is here for to ask questions and learn about something. Am I wrong?

Push370zzz

Sorry, just thought it was a ridiculous question. It's like saying "is my car's top speed lower when both seat heaters are on?"

The definitive answer is that your gas mileage will be a little different, but the difference will be so little (in either direction) that it is essentially immeasurable. There are probably a dozen other things that would affect your gas mileage more than having S-mode on, such as A/C being full blast, passenger weight, cargo weight, etc...

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cooltoy

Is it?

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