Mixing gas ok ?

[Michael]

Gas here in GA is up to $2.25 for premium. Is mixing 50% 83 with 50% 93 ok
for a WRX ?

 

[Frank Logullo]

Gas here in GA is up to $2.25 for premium. Is mixing 50% 83 with 50% 93 ok
for a WRX ?

Does WRX require premium? If not you are wasting your money. Mixing in a
car that does not require premium is OK but premium gives nothing extra
except cost.
Frank

 

[Michael]

Yes it does require premium.

Does WRX require premium? If not you are wasting your money. Mixing in a
car that does not require premium is OK but premium gives nothing extra
except cost.
Frank

 

[jabario]

USE regular and save a buck. in your manual it will say 93 recommended.
No harm will come.

 

[John A. Mason]

Gas here in GA is up to $2.25 for premium. Is mixing 50% 83 with 50% 93 ok

for a WRX ?

In my '02 VDC H6, premium is recommended, but regular can be used if
necessay.
I alternate generally every other fill up between mid-grade and premium. I
haven't noticed any negative effects.
John

PS Good to see another Georgia Suby owner!

 

[Ragnar]

USE regular and save a buck. in your manual it will say 93 recommended.
No harm will come.

Manual says 91 minimum. Go lower and risk pre-detonation (knock). Its
your car. Pay now or pay later.

 

[jabario]

Warranty will cover any "damage" . A friends passat turbo requires
premium but hasnt had it in 124k miles and the many problems this car
had were not fuel related. No manufacturer will produce a car that easy
to damage as they will pay warranty claims on a car that fragile. You
may lose some performance but thats it .

 

[CompUser]

@f14g2000cwb.googlegroups.com>,
(e-mail address removed) says...

Warranty will cover any "damage" .

Not for disregarding manufacturer's specs.

 

[JazzMan]

Gas here in GA is up to $2.25 for premium. Is mixing 50% 83 with 50% 93 ok
for a WRX ?

The ECM will detect any predetonation and retard timing
accordingly to prevent it. However, expect power to decline,
as well as gas mileage. Not by much, but it will probably
be noticeable.

JazzMan
--
**********************************************************
Please reply to jsavage"at"airmail.net.
Curse those darned bulk e-mailers!
**********************************************************
"Rats and roaches live by competition under the laws of
supply and demand. It is the privilege of human beings to
live under the laws of justice and mercy." - Wendell Berry
**********************************************************

 

[CompUser]

@o13g2000cwo.googlegroups.com>,
(e-mail address removed) says...

USE regular and save a buck. in your manual it will say 93 recommended.
No harm will come.

For WRX:
Manual says "engine is designed to operate using
premium unleaded gasoline with an octane rating
of 91 AKI or higher."

The ECU will retard timing AFTER it detects knock
from detonating lower octane fuel. The two
negative aspects to this are a) ECU responds only
post-knock event, so damage could already have
been done; b) the retarded timing will result in
less power ("Gee, the car feels slowwwww"), and
less miles per gallon.

Like another poster said, your car, you decide.
I don't do it in mine, you can be assured.

 

[TG]

Not so, as cars get more miles on them some tend to build up deposits which
can raise the compression ratio and make premium...or at least higher octane
than regular... necessary for reliability and performance. Subaru's are
notorious for this. TG

 

[TG]

Then don't do it, if you can't afford to maintain the car I suggest you get
something different. TG

 

[TG]

Right on, hope I never buy a car from someone like them. TG

 

[Mike]

On a side note: Does anyone know if that injector cleaner stuff they sell
at the gas stations work? You know, the stuff in the little red bottle that
you add to a tank of gas? I've heard that the Chevron (Tecron?) works but
that the rest, especially the 88-cent Wal-Mart special, doesn't... any
thoughts, opinions, or online summaries to the subject?

 

[Bart]

I've been wondering the very same thing..

I do note that when I use those injector cleaners, it screws with my gas
mileage for at least 1 fillup...

 

[Blair Baucom]

I've had good results with Chevron's Techron additive in my Ford Ranger's
3.0L V6. The spark knock would go away for 5000 miles or so after using it.

Lots of information here:

http://www.chevron.com/prodserv/fuels/techrongas/advantage.shtml

"Chevron has now been the exclusive supplier of the mileage accumulation
durability test gasoline to the three U.S. automobile manufactures for over
28 years."

Blair

 

[Blair Baucom]

A better link just to the additive:

http://www.chevron.com/prodserv/fuels/gas_qanda/tech_con.shtml

 

[George Adams]

Not so, as cars get more miles on them some tend to build up deposits which
can raise the compression ratio and make premium...or at least higher octane
than regular... necessary for reliability and performance. Subaru's are
notorious for this. TG

Well, I have a 1998 Forester that just turned 216,000 miles on the
odometer, and I am still running 87 octane, as recommended in the
manual. I guess it takes longer than that for the "notorious carbon
buildup".

I would use whatever grade is specified in the manual. Saving a few
pennies on gas at the expense of the engine is false economy.
Conversely, using a higher octane than required is throwing money away.

--

 

[jabario]

It does not say "catastrophic failure not covered by warranty will
occur if <91 octane is used" Performance MAY suffer but it is not
likely the average driver will notice.
You guys are so anal. I guess you think going 1 mile past the
recommended oil change will cause harm too.

 

[Generic]

I've had good results with Chevron's Techron additive in my Ford Ranger's
3.0L V6. The spark knock would go away for 5000 miles or so after using

it.

A few tanks of Chevron Supreme cleared up spark knock and noisy valves in a
car I used to drive.

-John