its 3.45/gal here, $4.09 for premium (which all my cars need)

I would be happy even being able to use 87, even though it doesnt seem gas prices will ever go down.

 

You say they all need premium, but in the example you gave in the first post you said you'd go from 125hp to whatever. If your D16Z6 has 125hp, and therefore is stock or close to it, it doesn't need premium.

 

I was talking about a 5th gen civic ex I might be buying soon.

Here are my engines:

The daily:


The toy:

 

I drive a '92 EX w/ D16Z6

Says 87 octane in the manual, and I've used premium in it twice before with no noticeable difference in acceleration, etc. The compression isn't that high on it.

I actually didn't realize there were any D series that needed premium :shrug:

 

No, what im saying is my 2 current cars require premium. I want to buy a car that can take 87 w/o issues. I was just thinking why it wouldnt be able to use e85...

 

one thing that will help your daily is get rid of that "cold air intake" that is doing nothing but sucking hot engine air anyways. put the stock air box back in and it can help your fuel economy by 1-2 mpg, making you lose what 5 hp MAYBE.

 

Im not talking about trying to optimize fuel economy for either of those two cars. I want to buy a 5th gen civic and make it as fuel friendly as possible for a daily.

 

Sucking down warmer air is actually better for fuel economy.

Oh OK, gotcha.

 

I didn't get the civic afterall, I went to test drive it. I inspected the car first. Right away I saw the interior was that "Peanut butter" color which I hate. The body was in pretty good shape, but the hood had no clearcoat. I looked under the hood and saw a mostly stock engine aside from a 4-2-1 header. Next I started the car and had a friend check for smoke. The car barely idled and had a check engine light. I could tell it had a random misfire and maybe even a vacuum leak. The engine reved HARD and sounded like a bad bearing. So I just handed the keys back and drove off. Bought an xbox elite instead