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What Octane Gas?
07-29-2004, 11:31 PM
#11
5th Gear Member
Join Date: Jul 2003
Location: United States
Posts: 3,451
RE: What Octane Gas?
Just something for you all to check out next time you're at a hardware, chemical, ect... store. http://www.vtr.org/maintain/gasoline-octane.html
Is anyone able to find these at these prices? I've found Xylene at Lowes Hardware, but it was $9.97/gal
Is anyone able to find these at these prices? I've found Xylene at Lowes Hardware, but it was $9.97/gal
07-30-2004, 03:19 AM
#15
Pro. B.S. caller outer
Join Date: May 2004
Location: IL
Posts: 9,644
RE: What Octane Gas?
Higher octane will not make a car blow up, it will ruin your O2 sensors, if it is leaded. A givin engine will make peak power with an octane that just keeps the car from detonation, any higher and you are really just waisting money. Now there are oxygenated fuels such as Rocket Brand 100 octane, these types of fuel will make slightly more power when they are fresh, unfortunatly if not stored properly they loose the oxygenation and are then the same as any other fuel of a givin octane rating. Here is a good read on octane I can give the link of the full article if anyone is interested, it gets a bit geeky but is a good read if you like this sort of thing.
6.13 Can higher octane fuels give me more power?
On modern engines with sophisticated engine management systems, the engine
can operate efficiently on fuels of a wider range of octane rating, but there
remains an optimum octane for the engine under specific driving conditions.
Older cars without such systems are more restricted in their choice of fuel,
as the engine can not automatically adjust to accommodate lower octane fuel.
Because knock is so destructive, owners of older cars must use fuel that will
not knock under the most demanding conditions they encounter, and must
continue to use that fuel, even if they only occasionally require the octane.
If you are already using the proper octane fuel, you will not obtain more
power from higher octane fuels. The engine will be already operating at
optimum settings, and a higher octane should have no effect on the management
system. Your driveability and fuel economy will remain the same. The higher
octane fuel costs more, so you are just throwing money away. If you are
already using a fuel with an octane rating slightly below the optimum, then
using a higher octane fuel will cause the engine management system to move to
the optimum settings, possibly resulting in both increased power and improved
fuel economy. You may be able to change octanes between seasons ( reduce
octane in winter ) to obtain the most cost-effective fuel without loss of
driveability.
Once you have identified the fuel that keeps the engine at optimum settings,
there is no advantage in moving to an even higher octane fuel. The
manufacturer's recommendation is conservative, so you may be able to
carefully reduce the fuel octane. The penalty for getting it badly wrong,
and not realising that you have, could be expensive engine damage.
6.13 Can higher octane fuels give me more power?
On modern engines with sophisticated engine management systems, the engine
can operate efficiently on fuels of a wider range of octane rating, but there
remains an optimum octane for the engine under specific driving conditions.
Older cars without such systems are more restricted in their choice of fuel,
as the engine can not automatically adjust to accommodate lower octane fuel.
Because knock is so destructive, owners of older cars must use fuel that will
not knock under the most demanding conditions they encounter, and must
continue to use that fuel, even if they only occasionally require the octane.
If you are already using the proper octane fuel, you will not obtain more
power from higher octane fuels. The engine will be already operating at
optimum settings, and a higher octane should have no effect on the management
system. Your driveability and fuel economy will remain the same. The higher
octane fuel costs more, so you are just throwing money away. If you are
already using a fuel with an octane rating slightly below the optimum, then
using a higher octane fuel will cause the engine management system to move to
the optimum settings, possibly resulting in both increased power and improved
fuel economy. You may be able to change octanes between seasons ( reduce
octane in winter ) to obtain the most cost-effective fuel without loss of
driveability.
Once you have identified the fuel that keeps the engine at optimum settings,
there is no advantage in moving to an even higher octane fuel. The
manufacturer's recommendation is conservative, so you may be able to
carefully reduce the fuel octane. The penalty for getting it badly wrong,
and not realising that you have, could be expensive engine damage.
07-30-2004, 03:38 AM
#17
Pro. B.S. caller outer
Join Date: May 2004
Location: IL
Posts: 9,644
RE: What Octane Gas?
I can buy leaded gas at my local Gas City right out of the pump,it does say it is "not for highway use" though
, it's only 6 miles from my house, I can also get it from the speed shop in drums, any gas over 105 octane will have some lead in it (I think it could be 108).
, it's only 6 miles from my house, I can also get it from the speed shop in drums, any gas over 105 octane will have some lead in it (I think it could be 108).
07-30-2004, 04:46 AM
#19
Guest
Posts: n/a
RE: What Octane Gas?
ORIGINAL: JD1969
I can buy leaded gas at my local Gas City right out of the pump,it does say it is "not for highway use" though, it's only 6 miles from my house, I can also get it from the speed shop in drums, any gas over 105 octane will have some lead in it (I think it could be 108).
I can buy leaded gas at my local Gas City right out of the pump,it does say it is "not for highway use" though
, it's only 6 miles from my house, I can also get it from the speed shop in drums, any gas over 105 octane will have some lead in it (I think it could be 108).
It's not widespread, how about that?