Do you use premium gas?

[vailpass]

Originally Posted by TEX

I use it in my GT 500 because I have a tune that requires at least 93 octane. I don't use it in my Explorer because the computer compensates for the lower octane rating. I wouldn't think you'd need it in your Odyssey as I'm sure the computer can easily make due with 87 octane.

Yep...

[Over Yonder]

Originally Posted by vailpass

Yep...

Yep +1
And an fyi for anyone wondering, the way to know what octane a vehicle needs is by the compression ratio. As a rule of thumb, anything under an 11.5/1 ratio is just fine on 87 octane. That aint a set in stone number, but its a good ballpark

[Bob Dole]

Originally Posted by ChiefsFan1st

Yep +1
And an fyi for anyone wondering, the way to know what octane a vehicle needs is by the compression ratio.

Or reading the owner's manual...

[TEX]

Originally Posted by ChiefsFan1st

Yep +1
And an fyi for anyone wondering, the way to know what octane a vehicle needs is by the compression ratio. As a rule of thumb, anything under an 11.5/1 ratio is just fine on 87 octane. That aint a set in stone number, but its a good ballpark

That rule does not apply if you have a car with forced induction. They have a lower compression ratio because they add boost. The higher the octane the better. (Assuming your air / fuel ratio is dialed in properly) In fact, insufficient or low octane can cause detonation, and then you can go BOOM!

[Over Yonder]

Originally Posted by TEX

That rule does not apply if you have a car with forced induction. They have a lower compression ratio because they add boost. The higher the octane the better. (Assuming your air / fuel ratio is dialed in properly) In fact, insufficient or low octane can cause detonation, and then you can go BOOM!

This is very true. I should of said with normal air intake. My bad

[TEX]

Originally Posted by ChiefsFan1st

This is very true. I should of said with normal air intake. My bad

You're good - you said "generally speaking" and most cars do not have forced induction. I wasn't correcting your statement, I was just letting folks who didn't know, like maybe the OP, that the general rule doesn't apply to forced induction cars. Having said that, you "can" run them on lower octane, BUT I don't know why anyone would want to because they don't run well at all and you should NEVER, UNDER ANY CIRCUMSTANCES, romp on them because BAD things can easily happen at high boost and low octane.