Fuel And Oil; Engine Oil - Buell Ulysses 2006 Service Manual

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FUEL AND OIL

FUEL
1 1
WARNING WARNING
Avoid spills. Slowly remove filler cap. Do not fill above bot-
tom of filler neck insert, leaving air space for fuel expan-
sion. Secure filler cap after refueling. Gasoline is
extremely flammable and highly explosive, which could
result in death or serious injury. (00028a)
Use a good quality unleaded gasoline (91 pump octane or
higher). Pump octane is the octane number usually shown on
the gas pump.
GASOLINE BLENDS
CAUTION
Do not use gasoline that contains methanol. Doing so
can result in fuel system component failure, engine dam-
age and/or equipment malfunction. (00148a)
Buell motorcycles were designed to give the best perfor-
mance using unleaded gasoline. Some fuel suppliers sell
gasoline/alcohol blends as a fuel. The type and amount of
alcohol added to the fuel is important.
DO NOT USE GASOLINES CONTAINING METHANOL.
Using gasoline/methanol blends will result in starting and
driveability deterioration and damage to critical fuel sys-
tem components.
DO NOT USE RACE GAS OR OCTANE BOOSTERS.
Use of these fuels will damage the fuel system.
ETHANOL is a mixture of 10% ethanol (Grain alcohol)
and 90% unleaded gasoline. Gasoline/ethanol blends
can be used in your motorcycle if the ethanol content
does not exceed 10%.
REFORMULATED OR OXYGENATED GASOLINES
(RFG): "Reformulated gasoline" is a term used to
describe gasoline blends that are specifically designed to
burn cleaner than other types of gasoline. Your motorcy-
cle will run normally using this type of gas.
You may find that some gasoline blends adversely affect the
starting, driveability or fuel efficiency of your bike. If you expe-
rience one or more of these problems, we recommend you try
a different brand of gasoline or gasoline with a higher octane
rating.

ENGINE OIL

Use the proper grade of oil for the lowest temperature
expected before the next oil change.
If it is necessary to add oil and Harley-Davidson oil is not
available, use an oil certified for diesel engines. Acceptable
diesel engine oil designations include CF-4, CG-4, CH-4 and
CI4. The preferred viscosities for the diesel engine oils, in
descending order, are 20W-50, 15W-40 and 10W-40. At the
first opportunity, see a Harley-Davidson dealer to change
back to 100 percent Harley-Davidson oil.
See 1.5 ENGINE LUBRICATION SYSTEM
information.
WINTER LUBRICATION
Combustion in an engine produces water vapor. During start-
ing and warm-up in cold weather, especially in freezing tem-
peratures, the vapor condenses to water before the
crankcase is hot enough to exhaust it through the breather
system. If the engine is run long enough for the crankcase to
become thoroughly heated, the water returns to vapor and is
then exhausted.
An engine used for only short trips, and seldom allowed to
thoroughly warm up, accumulates increasing amounts of
water in the oil reservoir. Water mixed with oil forms a sludge
that causes accelerated engine wear. In freezing tempera-
tures, the water becomes slush or ice, which may clog oil
lines and result in engine failure.
Always change the engine oil more often in winter. If the
engine is used for short runs, change the oil even more fre-
quently. The farther below freezing the temperature drops the
more often the oil should be changed.
2006 Buell Ulysses: Maintenance
1.2
for all service
1-5