i was watching Something on the speed channel where basically they ran a truck on a dino with 87 octane gas and then they ran it again with 93 octane gas and when they put the stats together the 93 octane gas had found to made a bit more horsepower and increased MPG...i was basically wondering has anyone have experience with this experiment?

 

I was just wondering the same thing

Would like to hear from some people if it actually works and is worth it

 

idk for certain on the mpg but it will help ever so slightly with performance. i will say when i would run higher octane fuel the car was more responsive and seemed to go further on a tank of gas but i never actually checked to verify. but in the end it probably averages to about the same because even if you go a little further you paid more to fill up with premium...

 

Don't waste you money, this argument has been had many times, if your car calls for 87, use it. Higher octane is really only going to benefit higher performance engines and fuel economy is probably just a waste of time.

 

i normally use 87, but when its time to fill up, iwill use 93, im really curious on this

 

I normally run 87 octane but I will run 93 octane every 4 or 5 fill ups. I do notice that the car does feel more responsive and it does go a little further on a tank which as some people have said on here, it's not much and really doesn't make a difference.

 

"
Unless your engine is knocking, buying higher octane gasoline is a waste of money. Premium gas costs 15 to 20 cents per gallon more than regular. That can add up to $100 or more a year in extra costs. Studies indicate that altogether, drivers may be spending hundreds of millions of dollars each year for higher octane gas than they need.
It may seem like buying higher octane “premium” gas is like giving your car a treat, or boosting its performance. But take note: the recommended gasoline for most cars is regular octane. In fact, in most cases, using a higher octane gasoline than your owner's manual recommends offers absolutely no benefit. It won't make your car perform better, go faster, get better mileage, or run cleaner. Your best bet: listen to your owner's manual.
The only time you might need to switch to a higher octane level is if your car engine knocks when you use the recommended fuel. This happens to a small percentage of cars."

 

John said it all, the additional money you pay for premium could have been spent of 85 and you could have bought more fuel and went even further. Run 85 if your Monte is happy with it...

 

i feel that even with higher octane gas, if you just do it once, you wont notice any difference because wont the car be used to running on lower octane, thus it would need to be filled with a few tanks of premium before it started adjusting to the higher octane?

 

It's not worth it.

The only time it is beneficial is if your car is TUNED to burn higher octane fuel. Your stock computer will make minor adjustments, but you are just going to have extra unburnt fuel in the system.

I usually don't listen to the recommendation for engines with high compression (like above 11:1). I feel higher compression engines benefit from the higher octane. Most of those engines also have 2 fuel tables for the different octanes too.

In the case of the truck. It probably had a problem internally, and it was causing knock. One way to defuse knock is to use a higher octane. Knock will pull timing and slow you down, if the higher octane stopped the knock, it wasn't pulling the timing so he had a few extra HP (IN COMPARISON). Really that's the HP he should have had on a knock-free run on 87. He would have to try to see where the problem is and get it fixed properly lol