A Brain Fart...
 

Got gas today and pumped about 10 gallons of regular (89) octane into MZ DAIZY Before I realized I pushed the wrong button on the pump. She’s been tuned for 93 octane. I figure there’s a mix of about 4 gallons of 93 to 10 gallons of 89. What should be my plan of action and how bad a F-UP is this?

It's not bad. You're not pushing boost. When you get down to 3/4 tank. Top it off again. Do this about 2 times. Don't run it hard until after the 3th time.

Thanks Rusty.. got so much going on in my mind with an elderly dementia parent. I scare myself sometimes... My wife tried to make me feel better by telling me that at least I didn’t pump diesel in her. That’s what she said! LOL. I’m preaching to the choir, but getting old ain’t for sissies... I’m walking into rooms and wondering the the eff I came into here for... sometimes the bathroom!

Thanks for the help! :bowdown:

As per Rusty, it's not that big of a deal. After a few fillups, you should be good to go. If you notice any knock/ping, let off the accelerator pedal until it goes away.

My buddy put diesel in his Harley one time and tried to start it. :rofl2: It was ugly. Called someone to pick the bike up at the station. They loaded it on a flat bed. On the way to the dealership. The bike fell over. :icon14:

Would adding a bottle of octane booster help raise the numbers and possibly make it easer on the motor?

I was wondering about octane booster, too.
Assuming the 14 gallons gave you a full 19 gallon tank, and the prior tank was 93 octane, the math puts you just under 91 octane for the tank full. Just go easy on her, and she'll be fine.



Kirk B.

Burn it off.

You are only in trouble if you hear knocking.


https://media.giphy.com/media/LFvQBWwKk7Qc0/giphy.gif

Just drive MZ DAIZY like you are driving Mrs. Daisy and that fuel will be gone in no time. No worries.

Should be fine... but STP has legit octane booster if you want to use some of that

Sent from my SM-G955U using Tapatalk

You could use octane booster. Just cost you more.

But our girls are WORTH it!


Kirk B.

My wife's aunt put diesel at her first fill up of her brand new Lexus several years ago. THAT was a problem.

I agree with others. Keep adding the right stuff frequently until all the cheap stuff is gone. Don't push it hard during the interim and you should be fine.

No worries, here I’ll tell you a story to help you feel a lot better...

Back around 2010 or so with our first nismo, wifey and I wanted to get a pre up rev tune dyno so we could compare before and after, the car had FI lth’s, FI cbe, cai.

We got to our shop for the dyno, decided to fill up beforehand since we were down below a 1/4 tank. Accidentally filled up with 87 octane since we hadn’t driven the z in a while and were used to filling up the dd.

Got to the shop, told them what happened, was expecting to reschedule but we decided to just pour in some octane booster, iirc it was race gas octane booster.

We dynoed, no pinging or knock, and the z put down 321 whp in 5th gear.

Car went on to be thrashed on the track for the next 3 years no problem.

You’ll be fine.

Yea, I’ve had bad days, but not that bad!

I see what ya did there! 😜

This has me thinking... I have no problem locally getting 93 octane, but let’s say I’m out of town and all they have is 91 octane? Never really thought about it since I rarely travel far with her.

That’s EXACTLY what happened! Just filled the wifey’s war wagon a couple of days ago and totally spaced out.

Thanks for the input. Youse guys is da best!

No problem. It won't make the same power. Timing will be pulled some.

The difference between 93 and 91 isn't all that much for a DD. The ECM will pull some timing and you will lose a little power but you shouldn't do any damage as long as you drive carefully. Keep your toenails out of the radiator until you can get the octane back up. :)

Personally, I'd use octane booster only if I got some very low octane (say >= 4 ratings less). Keep in mind that the octane boost printed on the bottle is usually in "points" not octane numbers - it's gonna take a lot of booster to make much of a difference.

I had Seb give me 91 and 93 maps when I was N/A. Probably do the same with FI

whew..... I thought you put the windshield washer fluid into the radiator.... :bowrofl:

The STP stuff has an insane # of points and one bottle will kick a full tank up from 91 to 93. But it ain't cheap

I didn't know there was anything that potent out there for the street. Thanks for the update.

Check out Boostane

Back in the day. We used to use tolulene as a octane booster. Worked with my 572 cu in, 14 to 1 Mopar motor.

https://media.tenor.com/images/6d44e...97e1/tenor.gif

Rebuilt the one motor in my '78 TransAm. Got everything in, hooked up and running. Motor runs great. Couldn't figure out why the windshield washer reservoir keeps going dry. :icon14: First time to use the washers. They don't work. :icon14: Found out when we put the hood back on. Someone :rolleyes: plugged the washer hose to a port at the base of the carb. :facepalm:

Oh, c’mon! Everybody knows you put oil in the radiator. Keeps the cooling system lubed...

I put "the370z.com" sticker on the intake ram to make it "cooler" :icon18: