Definiive answer ?? Y or N "05 T6

Can anyone give a definitive answer?? I have an 05 T6 Volvo. Should I run
high test gas in it. It seems to run the same on reg or high test to me. Any
problems down the road using regular...? Thanks for answers

John

 

My understanding: it will "run" but not make full power.

With lower octane gas, to prevent detonation, aka pinging, the car's
brain adjusts the timing away from the point which would yield maximum
power.

 

i would run high test gas....the car and motor is designed
for that octaine (high) in a pinch, every once and a while, you
can run lower or cheaper gas......it is a high performance
car, treat it as such......

or...get a different car, if it does not meet your needs....

just my $.02.........

 

You can run regular fuel, but the ECU will retard the timing and reduce
boost pressure somewhat and you will get less power. You'll also get
slightly lower fuel economy, whether this will be noticeable or not
you'll have to find out.

 

Run on minimum rated octane stated to save on gas costs. Only high
compression engines need high octane, its stated on what to use in you
manual, High will give more power and a bit better mpg but nowhere
near enough to make up cost difference, you might get 1-2/10th better
mpg. If you have a full car and are going through mountains with the
AC on then the extra power may be worth it. High test only cars are
for rich suckers who dont care about money.

 

He said his car is a T6, that's the top of the line high pressure
turbocharged engine and will most definitely benefit from high octane
fuel. If you don't want the extra power, you may as well save thousands
and buy the light pressure turbo or naturally aspirated models. Some of
us like the extra power and don't mind paying a couple dollars more to
fill the tank.

 

Run on minimum rated octane stated to save on gas costs. Only high
compression engines need high octane, its stated on what to use in you
manual, High will give more power and a bit better mpg but nowhere
near enough to make up cost difference, you might get 1-2/10th better
mpg. If you have a full car and are going through mountains with the
AC on then the extra power may be worth it. High test only cars are
for rich suckers who dont care about money.

 

My 02 V40 turbo calls for Regular, trying high octane for me is a
waste of money, are you sure it requires mors than 87-US,=93 Europe
rating

 

i have/had a 200 s80t6...and was told by my mechanic
never burn cheap/low octaine gas in the car...yes, it is possible
to do...if you drive like an "old lady" and never get on it hard...
to burn regular/cheap gas...but the motor really wants to run
on high quality/octaine gas...i cracked aprox 1/2 of the brown
plastic parts that go right around the spark plugs...due to detination
or
pinging using low octaine fuel......so...i say...if you want to own a
high
performance car...use the best fuel you can find...same for airplane
motors......don't skimp of fuel/oil/etc.......by a ford fiesta or an
old
vw or something if you want/need cheap.........

 

Mechanic, so what, what the the Volvo manual say, Your mechanic didnt
make the car, if it wont drive right on what is stated then it needs
work, mine is more fast than I need and im always way over limits
making time, high octane is pissing money away if the car is not
required to have it. Cars that need it get engine knock and no volvo
rated for low octane gets nock if its tuned. If you car is rated low
octane find a smarter mechanic.

 

your decision....if you crack the plastic spark plug
parts from detenation...it will run you aprox $100 parts
and labor (us$) to fix each one......do the math......

cheers

 

If you have detonation you will ruin or at least severly shorten motor
life if it happens often enough, if you have detonation on
manufacturer rated minimum octane needed you have mechanical or fuel
issues. If thats your issue it would be poor quality gas or a poorer
mechanic who lies to you. Since you count beans you know you cant
justify the extra cost vs mpg. If you knock on low octane try a
different gas brand then a different mechanic. I dont know where you
get gas but in Europe years ago very often we got was so bad we added
2-4 litres of pure alcohol to every tank or we couldnt drive, we were
always using always the highest octane on a tuned engine, but what was
sold was junk.

 

yes...true......my mechanic did sat to keep away from cheap
gas......quality is very important........cheers.....

 

As long as the gasoline meets all the specifications it is irrelevant
whether the gas is cheap or not. It does not make sense to fill in 98
octane gasoline on a car that is specified for 95 or 91. Would be a
waste of money.

Joerg

 

I beg to differ from Joerg's opinion but I believe there can be a big
difference in gasoline. It's true that there are minimum standards
that gasoline must meet, but they are just that, "minimum". I think
the better brands exceed those specs, particularly in cleaning
additives. The composition of gasoline is very complicated. It can
contain as many as 50 different chemicals, probably not all at the
same time, but still, a particular octane gasoline may be very
different between different brands.

I do agree that using a higher octane fuel than needed will not
improve performance. However, remember the R+M/2 formula. Different
brands can reach the pump octane number with different R and M
numbers. That can make a difference sometimes, particularly with high
combustion pressures, ie: turbocharged engines, among others.

Steve E

 

"Detonation will cause piston and ring damage, top ring groove wear,
scoring, sticking rings, loose head gaskets and possible complete
engine failure."

see: http://www.hastingsmfg.com/ServiceTips/engineering_bulletin_detonation.htm

 

" minimum standards " i doubt gas stations
that sell "cheap gas" (in colorado, usa) give a shit
about "standards" over profits & $$......

 

"detanoation" may not be the correct term....maybe
some sort of ping or spark related item...i saw the
brown spark plug sleevs or connectors that were
cracked...my motor ran as if it lost one or two cylinders
until i replaced the electrical part....i was advised to
watch the fuel i was burning.......no problems since
switching to hi octaine 91+.......b4 that, i was buring
the cheapest gas i saw at the pump...uasually regular...

 

I'd heard that it all comes from pretty much the same place. The only
gas I've ever had problems with came from Arco, and that was on more
than one occasion. I chalked it up to stale fuel or water contamination
but I'll never know for sure. I figure the gas may be the same, but the
storage conditions may vary.

 

yea, true for most gas...i would guess......

but, my s80 problem went away once i started burning
high octane...no pinging, no more busted electrical
spark plug parts.....sleevs...or whatever they are called....

cheers

ps: no regular for my "new" 2004 v70r...only the high octane....