So this afternoon, I was out and about doing errands. As I was close to BJ's I decided I'd fill up the tank in the Si (so I'd not have to worry about filling up for the next two weeks).

So I rolled in, and thought I pressed 93 and filled up. As I heard the nozzle switch off, I glanced at the pump and realized that I'd pressed 87

The tank was half full which means I put in a half tank of 87 (around 6.13 gallons in a tank with 13 gallon capacity) to go with the 93. Honda recommends premium gas (91) for the Si.

I remember Ellen saying it was ok, but I still am a little freaked out and was very gentle driving back home.

 

All is lost- no since in keeping it now! Might just as well give it to me!

 

Alright let me know when you want to come pick it up

I'm say that knowing you'd find its power very anemic (200HP and 139 lbf·ft torque)

Its basically half the car you have

 

Nbd the ecu will adjust accordingly

 

Truly NBD. I've done it more than once, not on purpose, but not paying attention, either. If you're concerned about it, though, I'm with Headchef...

 

Just drive it gently till you can put 93 in it at some point. Your milege might be bad on this tank. My experience is anecdotal. A friend ran a couple of tanks of regular in a Prelude Si that had "Premium Fuel" clearlyprinted on the gas gauge. It'll be cool but I'd give you a good price on your Fuji Blue.

 

I think it'll be ok Aashish given that you had 1/2 a tank of 93, it should
somewhat "balance out" with the 87 to get you close enough to 91.

 

Save the advice guys- Aashish I'm going to grab a bite to eat and then head over to pick it up.

 

Dave you have to flush that regular completely out of the fuel lines and all, so you should keep driving that Si until it's really empty.

 

Thanks for the assurance folks

Dave, catch me if you can (although that should not be a problem for you)