Octane

does anyone know what octane fuel the CA18DET takes?

whatever you are tuned for. stock could do anything, 91 will help prevent detenation.

mine was tuned on 93%.

If it is bone stock @ stock boost, then you can probably run 87-89 and be safe

silvia love @ Apr 21 2008, 01:53 PM
whatever you are tuned for. stock could do anything, 91 will help prevent detenation.

thanks for the info guys. it's a big help.

I say dont use anything under 91 The sigle cam runs like crap with anything less and being that the det is a better motor I would run the same

Go for 94. The difference in price is only a few cents compared to 91 and it won't bog down the car.

"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."

From this
http://www.faqs.org/faqs/autos/gasoline-fa...1/preamble.html

heres the section on octane ratings
http://www.faqs.org/faqs/autos/gasoline-fa...3/preamble.html

IggyEGuana @ May 9 2008, 06:13 PM You may be able to change octanes between seasons ( reduce
octane in winter ) to obtain the most cost-effective fuel without loss of
driveability.

Aren't all the japanese turbo motors tuned for japanese 98ron or 100ron fuel??? Thats what everyone down here agrees on,,, unless your using another model of ca18det....???

bumpstopbrawler26 @ May 22 2008, 06:21 AM
Aren't all the japanese turbo motors tuned for japanese 98ron or 100ron fuel??? Thats what everyone down here agrees on,,, unless your using another model of ca18det....???