With the price of gas being what it is, I say if you're building an engine you might as well build it for premium gas. Although we all hope the price will come down some, the harsh reality is it probably won't be down where it was for a long time,if ever. Percentage wise,20 cents on $2.40 isn't that much. You can run more compression,which helps mileage along with better performance. Shell V Power claims to have extra detergents in it, so there is that benefit. So dollar wise, it won't cost much extra & you have a better running engine.

What about E85 it is 40 cent cheaper here and has 100 octane. It will support 12 to 1. Just brain storming.

Funny thing with all the prices of gas going up C12 here anyway stayed the same as it was since last year. http://www.nastyz28.com/ubb/confused.gif

You make a good point tgw, what no one seems to ever look at is cost per mile instead of miles per gallon. In a typical 12mpg car, a 20 cent increase in fuel cost will be $16.60 per 1,000 miles. It makes no difference if that increase is from $0.99 to $1.19 or from $2.49 to $2.69. If your motor doesn't need the higher octane level it's wasted money to use the higher (and more expensive) grade. But, higher cylinder pressures that require higher octane CAN BE more efficient motors. Unfortunately, the sad fact is that we tend to build horribly inefficient machines that have peak power and efficiency WELL above the street usable range. Not to mention that our right foot tends to lean into the throttle to find that point of efficient power production http://www.nastyz28.com/ubb/wink.gif .

But cost wise,,, $1600 per 100,000 miles,, hell we spend WAY more than that in air freshners, car wax and chrome.

He, He!!

That's why I built a big, STREET, grunt motor unless I want to rpm the h-ll outta it!!!

Then I would go for a big bore/short stroke jobber that will see the high side of 7,000 rpm! (Like my 283/292/301 motor!)....

pdq67

<font face="Arial,Verdana" size="2">Originally posted by 80'427:
What about E85 it is 40 cent cheaper here and has 100 octane. It will support 12 to 1. Just brain storming.</font>

E85 likes 14-15:1 even better than 12:1, but beware. It costs 110% to produce ethanol today. That means that 110 BTUs are being consumed to produce 100 BTUs of ethanol. One day the people will get tired of supporting that losing proposition and stop subsidizing the production of ethanol. When that happens, you will see ethanol priced even higher than gasoline where it should be, and you will be stuck with a dinosaur engine that can't be driven anymore without very expensive fuel.

<font face="Arial,Verdana" size="2">Originally posted by craggar:
Funny thing with all the prices of gas going up C12 here anyway stayed the same as it was since last year. http://www.nastyz28.com/ubb/confused.gif</font>


That actually makes pretty good sense. C12 gets its high octane with good old fashioned tetraethyl lead, not by additional expensive refining. Lead makes for cheaper gas. Long live tetraethyl lead!!!!

Gary S you are right right now E85 is subsidized but as the cost of crude oil goes up it will be able to compete. I was only suggesting a possible fuel for street use that is currently low cost. I guess I think we should all use it but I am just a stupid farm kid and my dad is the nebraska corn growers president. I personally think it is ok to give money to a renewable fuel hell we have been giving money to the oil countrys for years why not support something here for once. Besides when the dina juice runs out what else will we burn? Besides it is the only thing that I can get at a pump that I can cruise my 12 to 1 427 on.

[This message has been edited by 80'427 (edited August 13, 2005).]

What about auto propane? Besides the cost of the conversion, propane has 110 octane, doesn't it?

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Will beg for parts, I'm not proud.