canAudian

just bought a 02 allroad, 6MT from new jersey. will be picking it up end of july. 2 questions
1: what brand and octane gas do you use? (with stock ECU)
2: anybody have a used hitch? allroadCole what did you do with that old hitch i saw in a post of yours a few months back?

Rally_nutcase_1982

and Gas mileage will get worse, trying to save money going this route wont do any good, it will more likely harm your wallet.
With a 6MT, you can save if you shift a bit earlier and keep the RPM's in lower range.

ColoradoSpringsAR

at Sam's Club when I reach roughly half tank. I live at 7000 feet in Colorado and frankly do not see a difference between regular or premium in the performance (around town) or in the mileage.

Rally_nutcase_1982

VOLKSWAGEN/AUDI
Fuel Supply
Use only unleaded fuel in your vehicle.
Fuel Recommendation
The fuel recommended for your vehicle is
unleaded premium grade gasoline with a
minimum octane rating of 91 AKI
[=(R+M)/2]/95 RON or higher.
The recommended gasoline octane rating
for your engine can also be found on a label
located on the inside of the fuel filler flap.
This rating may be specified as AKI or RON.
Your vehicle may also be operated using
unleaded regular gasoline with a minimum
octane rating of 87 AKI / 91 RON. However,
using 87 AKI/91 RON octane fuel will lead to
a certain loss of engine power.
Notes
* Do not use any fuel with octane
ratings lower than 87 AKI or 91 RON
otherwise expensive engine damage
will occur.
* Do not use leaded gasoline!
The use of leaded gasoline will severely
damage your vehicle's catalytic
converter and its ability to control
exhaust emissions.
Unleaded gasoline is available throughout
the USA, Canada, and in most European
countries. We recommend that you do not
take your vehicle to areas or countries
where unleaded gasoline may not be
available.
Octane Rating
Octane rating indicates a gasoline's ability to
resist engine damaging "knock" caused by
pre-ignition and detonation. Therefore,
buying the correct grade of gasoline is very
important to help prevent possible engine
damage and a loss of engine performance.
Gasolines most commonly used in the
United States and Canada have the
following octane ratings that can usually be
found on the filler pump:
Premium Grade: 91 - 96 AKI
Regular Grade: 87 - 90 AKI
Explanation of the abbreviations:
AKI = Anti Knock Index =
(R+M)/2 = (RON + MON)/2
RON = Research Octane Number
MON = Motor Octane Number
Use of gasoline containing alcohol or
MTBE (methyl tertiary butyl ether)
You may use unleaded gasoline blended
with alcohol or MTBE (commonly referred to
as oxygenates) if the blended mixture meets
the following criteria:
Blend of gasoline methanol (wood
alcohol or methyl alcohol)
-Anti-knock index must be 87 AKI or higher.
-Blend must contain no more than 3%
methanol.
-Blend must contain more than 2%
cosolvents.
Note
Methanol fuels which do not meet these
requirements may cause corrosion and
damage to plastic and rubber
components in the fuel system.
Blend of gasoline and ethanol (grain
alcohol or ethyl alcohol)

ColoradoSpringsAR

Thanks for the data. I'm wondering if that applies at higher altitudes. The reason I ask is that regular gas at sea level is 87 octane. At high altitudes it is 85 octane for regular and 91 for premium. What do you think?

canAudian

Lots of info but nothing on ethanol blended fuel... up here we get 10% ethanol

paulroad

Or are you saying that 85 octane is all that is available in your area?

paulroad

In NY, we do get 93 octane.

Trango

...and I always thought that the octane thing related to pinging in gas was related to the scaling number of moles of 02 in a given volume of air at different altitude. In an NA engine, there is less air in each cylinder to cause a lean condition, meaning that not only do you lose power, but there's less reason for an anti-knock additive.

Intuitively, I've also believed that this holds for forced induction. Even though there is the same amount of "boost" in integers as an engine at sea level, the actual quantity of air is lower still, since boost is nothing more than a relative comparison, again, still referenced off a lower pressure ambient atmosphere.

Maybe I'm wrong, but this is the only thing that makes sense to this brain.

Rally_nutcase_1982

ever want to look up some numbers....applicable for the US mostly<ul><li><a href="http://www.fueleconomy.gov/">http://www.fueleconomy.gov/</a</li></ul>