jdsmith575

I accidentally put 10 gallons of regular unleaded into my tank this evening. I only had about 1 gallon left when I stopped to fill up.

So besides degraded performance for the next 10 gallons, have I done any other damage? Permanent damage?

(2007 with navigation, BTW)

LuvMyTSX

Nothing. Just fill up with 91/93 when you get down to 1/2 a tank or so. I had that happen to me once. I asked the attendant for 93 and he put in 87.

helraiser

Permanent damage? Better take the car in for a trade or see if they'll take it back on the 30day return policy!

Seriously tho, u'r fine. You don't want to make it a habit but a tank of regular won't kill it.

JTso

iTrader: (2)

No big deal. That's what dealers put in anyway on new car delivery.

confusedjojo

once or twice wont be bad but if you do it everytime i hope your just leasing the car then.

Trophyhead

That's it! Put a gun to its head and put it out of its misery!

clee109

if you're really freaked out pour in an octane boost and/or some fuel system cleaner. However; the knock sensors will compensate for the poor fuel. You will have slightly poorer performance, but will really only notice it when putting on alot of load.

CCColtsicehockey

You car is going to hate you now. You have mistreated it. You need to sell it immediately and buy a new one or else you are doomed for life. Putting the wrong octane in a car is the worst thing you can do ever.

Actually you are fine just fill it up with 93 next time.

PJS

Nothing to stop you putting in a bottle (or what it recommends for the amount of fuel you have in the tank) of Octane booster.
As everyone has said above - no big deal.

jdsmith575

That's good to know. Thanks for all the replies.

JAB00

Your car will be alright, just like all the other replies

bluexcrush

nothing much, happens its okay actually just the car doesn't go like it used to until you used all the gas

jlukja

some good reading on this topic: https://acurazine.com/forums/showthread.php?t=33769

RGlesing

GO DIRECTLY TO JAIL! DO NOT PASS GO. DO NOT COLLECT $200.

bz268

Nothing. The computer will just fire the spark plugs earlier. That's about it.

JTso

iTrader: (2)

What do you mean?

Ellas9

I think its the opposite. Wouldn't the mixture explode to fast becuase of the lower octane. So therefore, you would delay the firing; I don't know?

..either way to the original poster, who cares - top it up with premium, it won't matter for one tank.

bz268

The computer "retard" the timing... so, it fires early... right?

JTso

iTrader: (2)

Retard means later in relationship to piston top-dead-center.

psteng19

I would recommend against using octane booster due to bad experiences with it and damaging the cat.

PJS

Which brand was this?
And over what period of time did you use OB additive?

jlukja

Never ever wash your cat in octane booster.

swirlie

retard = to slow
So, as JTso said.

Haha, I wish I had the picture of an ex's cat handy. It was standing on the toilet, soaking wet, and looking rather furious... 7-toed paws and all.

waTSX