HIGH OCTANE FUELS

[IllusionX]

guys... keep in mind that higher octane fuel might have cleaning additives and possibly less E85 than regular fuel. This is just some reasons why you get better fuel economy with higher octane in an economy car like the yaris... that do NOT require premium.

[roxy1]

Originally Posted by IllusionX

guys... keep in mind that higher octane fuel might have cleaning additives and possibly less E85 than regular fuel. This is just some reasons why you get better fuel economy with higher octane in an economy car like the yaris... that do NOT require premium.

is their any evidence higher octane fuels use less ethanol? ive seen more indications that higher quality fuels have the additives regardless of octane. i know for a fact the stations i use have cleaning additives in their 87 octane.

since there has been some consensus from more knowledgeable people that higher than 87 octane can actually reduce your mileage in the yaris (some forum members have already shown this to be so) then the lowest cost of ownership, fuel wise, doesnt even require any thought whatsoever.

Octane Myths
• High octane gasoline improves mileage.
In general, if your car is designed to run on 87 octane gasoline, high octane gasoline will not improve
mileage. If switching to high octane gasoline does improve mileage, you might find that your engine, or its
control systems, need repair.
• High octane gasoline gives quicker starting.
No, it doesn’t.
• High octane gasoline increases power.
If your car is designed to run on 87 octane gasoline, you shouldn’t notice any more power on high octane
gasoline. Again, if it does make a noticeable difference, your engine, or the engine’s electronic control
systems, may need repair.
• High octane gasoline has been refined more – it is just a better product.
Additional refining steps are used to increase the octane; however, these additional steps do not necessarily
make the gasoline a “better” product for all engines. They just yield a different blend of hydrocarbons that
burn more slowly. The additional steps also increase the price.

[intake]

the extreme advanced electronic management of the yaris can see wen you use high octane fuel, and change it's timing in spark plug lightining, so you have more power

[roxy1]

Originally Posted by intake

the extreme advanced electronic management of the yaris can see wen you use high octane fuel, and change it's timing in spark plug lightining, so you have more power