Improves Engine Performance

[nico]

Your local gas station probably offers you 3 levels of gasoline, like
gold, silver and bronze. These typically have different levels of
octane in them and you will generally get a little better mileage for
the more expensive type.

In addition to different octane levels there are many different
additives that can be in a companies brand of gasoline and this
differentiation can have a big impact on your vehicle.

One type of additive is a detergent which generally cleans your
engine. Without some level of detergents engine deposits form and this
causes reduced fuel efficiency, acceleration and power as well as
increasing emissions and rough idling.
http://www.zone-car.com/?gasoline-detergent-improves-engine-performance.php

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used car resources

 

[JD]

Your local gas station probably offers you 3 levels of gasoline, like
gold, silver and bronze. These typically have different levels of
octane in them and you will generally get a little better mileage for
the more expensive type.

Not if the car is not tuned for it. If it is tuned for 87, buying anything
higher is a waste of money.

 

[David]

Not if the car is not tuned for it. If it is tuned for 87, buying anything
higher is a waste of money.

Modern cars adjust the tuning constantly. There is no practical
difference between grades of gasoline other than knock resistance.

 

[JD]

Modern cars adjust the tuning constantly. There is no practical
difference between grades of gasoline other than knock resistance.

That's my point. You won't get better gas mileage on higher grades of fuel
unless the engine calls for it.

 

[Carl 1 Lucky Texan]

That's my point. You won't get better gas mileage on higher grades of fuel
unless the engine calls for it.

You can, however, get worse mileage with lower grades if you car is
designed for high octane.


Carl

 

[JD]

You can, however, get worse mileage with lower grades if you car is
designed for high octane.


Carl

Depending on the car, you can do damage over the long term with lower
grades.

 

[bigjim]

Please stop with the bogus "damage caused by wrong octane" BS. No
average car will suffer damage from not using 93. Performance on a
dyno "may" be slightly less but your vehicle will last and you will
save money!

 

[JD]

We have been this route with you. You don't know what you are talking
about. Even if you are right and no damage occurs (which isn't right) the
drop in gas mileage more than offsets the lower cost of lower grade fuel,
and you still have a performance hit.