Accidentally poured zMax engine treatment into fuel tank. Did I wreck my car?

blbw121

New Member
2
6
Hello everyone,

I was at the parts store today, and I saw the zMax fuel system additive and decided to try a bottle. Well, it turns out I grabbed the engine treatment oil additive zMax instead. I drove the car after filling the tank it up all the way for 2-3 miles. Is my car about to die on me? How bad did I ruin the car? I don't notice anything odd about how the car operates nor is there smoke in the tail pipe. I feel so stupid making such a mistake like this. I have '12 Honda Civic Si.
 

Nix

Jötunn Moderator
10,765
8,162
Lew-vul, KY
Body Style
It's A Fast Pig!
I'd call ZMAX and ask them what you should do. I have no idea.
 

420Coupe

Well-Known Member
478
262
Vehicle Model
LX
Body Style
Coupe
Do you have any way of flushing the fuel system ? aka removing all gas currently in the tank and cleaning out injectors, possibly even fuel lines.
 

Zammittt

Well-Known Member
17
4
Toronto, Ontation, Canada
Vehicle Model
civic si
Body Style
sedan
Hello everyone,

I was at the parts store today, and I saw the zMax fuel system additive and decided to try a bottle. Well, it turns out I grabbed the engine treatment oil additive zMax instead. I drove the car after filling the tank it up all the way for 2-3 miles. Is my car about to die on me? How bad did I ruin the car? I don't notice anything odd about how the car operates nor is there smoke in the tail pipe. I feel so stupid making such a mistake like this. I have '12 Honda Civic Si.
Ask your dealer if they can remove the fuel from the tank...Most places can just disconnect the fuel line at the fuel rail and with the honda software they can force the fuel pump on and run the fuel pump until it drains the fuel tank. Then re-fill your car with 91+ and your good to go...I work at a dealership (not Honda) and we do it all the time
 

Nix

Jötunn Moderator
10,765
8,162
Lew-vul, KY
Body Style
It's A Fast Pig!
I was leaning towards draining the system completely but Zmax might say that it's fine to just run it through and burn it off. It might damage something though. Having it towed and drained is easily the safest option.
 

blbw121

New Member
2
6
Hi guys! Sorry guys, I was incredibly busy at work yesterday I forgot to make a post. I took my car to the shop (towed) and they told me they weren't going to drain the tank as the zMax engine and fuel additives are exactly the same formula and this has happened to customers in the past. I called zMax and they told me the same thing.
 

zuckuss00

Well-Known Member
33
16
SoCal
Vehicle Model
2012 Civic Si
Body Style
Sedan
One of my friends poured a oil additive into his gas tank once. We had to pull the fuel pump and siphon 16 gallons of fuel from the tank.
 
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