so i went and put 20 bucks of gas in my car today cuz i just bought it, right before putting in the gas i looked through my manual real fast nad didn't see anything about octane rating, so i put in 87 unleaded in it, so now i have like 7 gallons or so in there, and the highest octane they sell here is 91, should i fill the rest of the tank with 91 and hopefully is sorta evens out? or should i just take a long drive going really easy on the car watching temperature or what? i have no clue, what do i do!?!? thanks guys, oh yea, it's a 97 prelude base model

 

i think your ok... just dont do it again

 

Not sure about the effects on runnin that gas through but pourin in about 15 bottles of octane booster is also an option.

 

It's OK, just don't drive hard like reving over 4K...

 

Drive it like normal. The car will pull timing and you'll be fine.

Just try not to do it again

 

actually its not unhealthy at all for a motor to run lower octane through every once in a while. just put 91 in next time, and drive like normal.

 

my ex co-worker did that when the boss went out of town for a week and left his car with him... He didn't notice the Premium only on the dash, and put 87 in about 4 times that week. Car ran fine, but I'm sure he wasn't getting the performance out of it it could have been doing.

 

I think he'll be fine mixing in some premium gas.........everything should go well - it'll act like an octane booster i guess......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NaptownKing &raquo;</TD></TR><TR><TD CLASS="quote">I think he'll be fine mixing in some premium gas.........everything should go well - it'll act like an octane booster i guess......</TD></TR></TABLE>

it'll mix and average out somewhere around 89 depending on volume of each. Lower octane gas is good for your injectors, and unless you are turbo or have high compression, it won't hurt anything.

 

Throw some moth boths in there and turn ur 87 octane into some race gas.

 

what is considered high compression to you? isn't an h22 like 10.2:1 or something?

 

He should be fine. My buddy is running 85 octane in his JDM H22A all day long for the pass year or so and he race with it and its still fine..

 

it's fine bro, my wife use 87 all year long in her 99 lude and running fine although i always tell her to get 91

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pr1mo_13 &raquo;</TD></TR><TR><TD CLASS="quote">what is considered high compression to you? isn't an h22 like 10.2:1 or something?</TD></TR></TABLE>

USDM 10:1
JDM 10.6:1
JDM Type S 11:1

 

You're fine. Honda tuned the cars from the factory to compensate for dipsticks like you

They got a knock sensor there for a reason....

 

Your car will blow up in pieces. Just.... kidding.

 

Floor it until you hear pinging noises - that's the fuel jettison kicking in, and it will clean the gas tank out quickly.
Just kidding, never ever ever listen to me.