2015 AUDI RS5 COUPE engine

Driving and th e environment
It makes sense to shut off the engine in traffic
jams, when waiting for trains to pass at rai lroad
crossings, or at traff ic lights that have long waits
on red. Turning the eng ine off for just 30-40 sec­
onds saves more fuel than is burned starting the
engine again .
It takes a long time for the engine to warm up
fully when it is running at idle. However, wear
and nox ious em issions are especially h igh when
the engine is warm ing up. So you should dr ive
away as soon as you start the engine and avoid running at high rpms while the engine is still
warming up.
{[) Note
Do not leave engine idling unattended after
starting. If warning lights should come on to
indicate improper operation, they would go
unheeded. Extended id ling a lso produces
heat, wh ich co uld resu lt in overheating or ot h­
er damage to the vehicle or other property .
Regular maintenance
A badly tuned engine unnecessarily wastes a lot
of fuel.
~ Have you r vehicle se rv iced at regular i nte rva ls.
By having your vehicle regularly serviced by an
author ized Audi dealer helps to ensure that it
r u ns p roperly and economically. The condition of
your veh icle not only affe cts its safety and ability
to hold its va lue, i t also affects
fue l con sump ­
tion.
Ch eck your oil each tim e you fill your tank .
The amount of oil used is related to engine load
and speed .
It is normal for the oil consumption of a new en­
g ine to reach its lowest value after a certain mile­
age has been driven.
You must drive yo ur vehicle about 3,000 miles
(5,000 ki lometers) before you can properly as­
sess o il consumption .
This a lso applies to fuel consumption and engine
output .
180
(D Note
-Have your veh icle ma intained properly and
in accordance with the service recommenda­
tions in your Warranty
& Maintenance book­
let. Lack of proper maintenance as well as
improper use of the vehicle will impair the
function of the emission control system and cou ld lead to damage .
- Do not alter or remove any component of the Emission Control System unless ap­
proved by the manufacturer.
- Do not alter or remove any device, such as
heat shields, sw itches, ignit ion wires,
valves, which a re des igned to p rotect your
vehicle's Emission Control System and other
impo rtant vehicle components.
Fewer short trips
Fuel consumption will always be relatively high
on short trips.
~ Tr y to avoid dr iv ing sho rt distances w ith a co ld
eng ine .
The eng ine and cata lytic converter have to reach
their opt imal
op erat ing temperature to reduce
fuel consumpt io n and noxious em issions effec­
tive ly.
Just after starting, a co ld eng ine in a mid -s ize car
o nly achieves a fuel economy of 6-8 m iles per
gallon (30-40 l/100 km). After about a half a
mile, fuel economy climbs to 12 mpg ( 20 l/100
k m). After about
2.5 mi les ( 4 km) , the eng ine is
at i ts p roper operating tempera ture and fuel
economy has reached a normal level. So you can
see that yo u should avo id short trips whenever
poss ib le.
The
outside temperature is also cr itical in th is re­
gard. Your car cons umes more fuel in the winter
than in the summer.

Fuel and Refueling
Fuel
Fuel supply
Using the right fuel helps keep the environment
clean and prevents engine damage.
Fuel recommendation
The fuel recomme nded for yo ur vehicle is unlead­
ed premium
grade gaso line. A udi recommends
usi ng TOP TIER Detergent Gasoline w ith a min i­
mum octane rating of 91 AKI (95 RON). For more
i nformation on TOP TIER Detergent Gaso line,
p lease go to the official website
(www.toptiergas.com).
The recommended gasoline octane rating for
your e ng ine can a lso be found o n a label located
on the inside of the fue l filler flap. This rating
may be specified as AKI or RON.
Your veh icle may also be operated using unlead­
ed regular gaso line with a minimum octane rat­
in g of 87 AKl/9 1 RON . Howeve r, using 87 AKI/91
RON octane fue l will s ligh tly reduce eng ine per­
fo rma nce.
Use unleaded gasoline only . Unleaded gasoline
i s availabl e thr oughout the USA, Canada, and in
most European cou ntries. We recommend t hat
you do not t ake yo ur vehicle t o areas or countr ies
w here unle ade d gaso line may no t be availabl e.
For mo re info rmat io n on r efueling your ve hicle ,
see
r=;, page 184 .
Octane rating
Octane rating ind icates a gaso line's ability to re­
sist engine damaging "knock" caused by prema­
ture ign ition and detona tion. The refor e, buying
the co rrect g rade of gasoli ne is very important to
h e lp p reven t possib le eng ine damage an d a loss
of eng ine perfo rm anc e.
Gasoline mos t commonly used i n the Uni ted
S tates a nd Canada has the following octane rat-
"' ings that ca n usually be fo und o n the filler pu mp:
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~ -Prem ium Grade: 91- 96 AKI
,...., \!) 1.1'1 -Regular G rade: 87 -90 AKI N 1.1'1 ,....,
Fuel and Refueling
Explanation of the abb revia tions :
A KI=
A nti Knock Index= ( R+ M )/2 = (RO N+M ON)/
2
RON = Research Octane Number
MON = Motor Octane Number.
(D Note
- Do not use a ny f ue l w ith octane rat ings low­
er than 87 AKI or 9 1 RO N othe rwise e xpe n­
sive engine damage w ill occur .
- Do
not use leaded gasoline . The use of lead­
ed gas oline will severely damage your veh i­
cle 's catalytic converter and its ab ility to
cont rol exha ust em issions.
Blended gasoline
Use of gasoline containing alcohol or MTBE
(methyl tertiary butyl ether)
You may us e unleaded gasoline bl ended with a l­
coho l o r MTBE (c om monly referred to a s oxygen­
ates) if the b lended mixtu re mee ts the following
c rit e ria:
Blend of ga soline methanol (wood alcohol or
methyl alcohol)
- Anti-knock index must be 87 AKI or higher.
- Blend must contain no more t han 3% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of gasoline and ethanol (grain alcohol or
ethyl alcohol )
-Anti -kno ck index mus t be 87 A KI or higher.
- Blend must not co nta in mo re than 10% etha-
nol.
Blend of gasoline and MTBE
- Anti -knoc k index must be 87 AKI or higher.
- Blend must contain not mo re than 1S% MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform es­
p ecially well for winter o r su mmer dr iv ing . D ur­
i ng seasonal cha nge-ove r, we s uggest that you
fill up at busy gas s tat io ns w here t he se asona l
adjus tme nt is mo re lik ely to be made i n time. .,..
183

Fuel and Refu elin g
CJ) Note
-Methanol fuels which do not meet these re ­
quirements may cause corros ion and dam­
age to plastic and rubber components in the
fuel system.
- Do not use fuels that fail to meet the speci­ fied criteria in this chapter .
- If you are unable to determine whether or
not a particular fuel blend meets the speci­
fications, ask your service station or its fuel supplier.
- Do not use fuel for which the contents can­
not be identified.
- Fuel system damage and performance prob­ lems resulting from the use of fuels differ­
ent from those specified are not the respon­
s ibility of Audi and are not covered under
the New Vehicle or the Emission Contro l
System Warranties.
- If you experience a loss of fuel economy or
driveability and performance problems due
to the use of one of these fuel b lends, we
recommend that you sw itch to unb lended
fuel.
Gasoline additives
A major concern among many auto manufactur­
ers is carbon deposit build-up caused by the type
of gasoline you use .
A lthough gasoline grades differ from one manu­
facturer to another, they have certain things in
common. All gasoline grades contain substances
that can cause deposits to collect on vita l engine
parts, such as fuel injectors and intake valves. Al­
though most gasoline brands include additives to
keep eng ine and fuel systems clean, they are not
equally effect ive .
Audi recommends using TOP TIER Detergent Gas­
oline . For more information on TOP TIER Deter ­
gent Gasoline, please go to the official webs ite
(www .toptiergas .com).
After an extended period of using inadequate
fuels, built-up carbon deposits can rob your en­
g ine of peak performance .
184
(D Note
Damage or malfunction due to poor fuel qual­
ity is not covered by the Audi New Vehicle
Limited Warranty.
Refueling
Fuel filler neck
The fuel filler neck is located on the right rear
side panel behind the fuel filler flap .
If the power lock ing system should fail, you can
still open the flap manually - for detailed instruc­
tions see
9 page 186.
You can find the fuel tank capacity of your vehicle
in 9 page234.
The label on the inside of the fuel filler flap tells
you the correct fuel for your vehicle . For more in­
format ion about fuel specifications, see
9 page 183.
Your vehicle fuel tank has an on-board refuelling
vapor recovery system. This feature helps to pre­
vent fuel vapors from escap ing from the tank and
po lluting the environment while you refuel your
vehicle. In order to fi ll the tank properly while
protecting the environment , p lease follow this
r efueling procedure carefully .
_& WARNING
Under normal operating conditions, never car­
ry additional fuel containers in your car . Gas
can isters and other containers used to trans­
port fuel can be dangerous . Such containers,
full or empty, may leak and could cause a fire in a co llision .
If you must transport fuel to
use for your lawn mower, snow blower, etc .,
be ve ry careful and always observe local and
state laws regarding the use, transportation
and storage of such fue l conta iners . Make cer­
tain the container meets industry standa rds
(ANSI/ASTM F8S2 - 86).
@ Note
Neve r drive your veh icle until the fuel tank is
complete ly empty. The ir regular supply of
f u el can cause misfiring. Gasoline could enter ..,.

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the exhaust system and damage the catalytic
converter.
Refuelling
Fig . 155 Rig ht re ar v ehicl e sid e: Op enin g the fuel fille r flap
Fig. 156 Fuel f ill er fla p with atta ched fuel cap
When activating the central locking, the fuel fi ll­
er flap is automatically un locked or locked . Re­
fuel the veh icle with the ignition turned
off.
Taking the fuel cap off
~T urnoff the ignition.
~ Press the left side of the fue l filler flap to open
it
q fig. 155 -arrow -.
~ Unscrew fuel cap count er-clockw ise and hang it
on the fuel filler flap~
fig. 156.
Refuelling procedure
~ Insert the fuel nozzle from the gasol ine pump
into the fuel filler neck as far as it will go.
~ Select a medium refuelling rate so that the
nozzle switches off automat ica lly when the
tank is full.
Putting the fuel cap back on
~ After filling your tank, tw ist the f uel cap clock­
wise as far as it wi ll go.
~ Close the fuel filler flap.
Fuel and Refueling
To avoid fuel spilling or evaporating from the fuel
tank always close fue l cap proper ly and com­
pletely .
A WARNING
--
Improper refueling or handling of fuel can
cause fire, explosion and severe burns.
- Fuel is highly flammable and can cause se­
vere burns and other injuries.
- Failure to shut the engine off while refuel­
ing and/or to insert the pump noz zle fully
into the fue l filler neck could cause fuel to
spray out of filler neck or to overflow . Fuel
spray and overflowing fuel can cause a fire.
- Never use a cellular telephone while refuel­
ing. The electromagnetic radiation can
cause sparks that can ignite fuel vapors and
cause a fire .
- Never get back into your vehicle while refu­
eling. If in exceptional circumstances you
must get back in your vehicle whi le refuel­
ing, make certain that you close the door
and touch metal to discharge static electric­
ity before touching the filler nozzle again.
Static electricity can cause sparks that can ignite fue l vapors re leased during refueling.
- Never smoke or have an open f lame any­
where in or near your vehicle when refueling
or filling a portable fue l conta iner .
- For your safety, we strongly recommend
that you do not travel with a portable f uel
container in your vehicle. The container, full
or empty may leak and cou ld cause a fire,
especially in a crash.
- If, under exceptional circumstances, you
must transport a portable fuel container,
ple ase observe the following:
- Never fill a portable fuel container while it
is anywhere in or on the veh icle (for exam­
ple, in the luggage compartment, or on
the trunk). Static e lectricity can build up
while filling and can ignite fuel vapors
causing a f ire.
- Always place a portab le fue l container on
the ground before filling .
185

Fuel and Refueling
-Always keep the fi ller nozzle completely
inside the portable container before and
during filling.
- If filling a portable container made of
metal, the filler nozzle must always be in
contact with the container. This will help
prevent static electricity from discharging
and cause a fire .
-Never sp ill fuel inside the vehicle or lug­
gage compartment. Fuel vapors are highly
flammab le.
-Always observe local and state/provincia l
laws regarding the use, storage and trans­
portat ion of fuel containers.
- Make certain the fuel container meets in­
dustry standards (ANSI/ ASTM F852 -86) .
(D Note
If any fuel has spilled onto the car, it should
be removed immediately to prevent damage
to the paint .
@ For the sake of the environment
As soon as the correctly operated nozzle
switches off automatically for the first time,
the tank is full. Do not try to add more fuel
because fuel may spill out . In addition, the
expansion space in the fuel tank will be filled·
causing the fuel to overflow when it becomes
warm and pollute the environment.
(j) Tips
- Running your engine while refuelling may
cause vapors to escape or even cause fuel to
sp il l out of the tank . This wo uld then shut
off the fuel nozzle before the tank is full.
- Do not refuel your veh icle with the ignition
turned on. The fuel gauge may otherwise
not indicate the correct fuel level after refu­
elling.
- The fuel filler flap of your vehicle is not
l ocked when you lock the vehicle from the
inside .
186
Unlocking the fuel filler flap by hand
You can open the fuel filler flap by hand if the
power locking system should fail .
Fig. 157 Luggage compartme nt: ope ning the side trim
Fig. 158 Luggage compartment: Emer gency open ing of
fuel fil ler flap
The emergency opening mechanism is located
behind the right side trim panel in the luggage
compartment.
Opening the side trim
.. Insert a tool such as a screwdriver ¢page 216
or the emergency key into the right side of the
upper gap¢
fig. 157.
.. Pry upward to release the trim .
Fuel filler door emergency release
.. Loosen the strap from its bracket and pull on it
¢ fig. 158. You can now open the fuel filler flap
as usual
¢page 185.

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Checking and Filling Hood
Releasing and opening the engine hood
The engine hood is released from inside the vehi­
cle.
Fig. 159 Driver's side footwell: e ng in e hood release lever
Fig. 160 Releas e lev er un der t he e ngin e hood
Before opening the engine hood, make sure that
the windshield wipers are flat against the wind­
shield . Otherwise, they could damage the paint
on the hood.
.. With the driver's door open, pu ll the lever un­
der the instrument panel in the direction of the
arrow
c::> fig . 159.
.. Ra ise the hood slightly c::> &.
.. Press the rocker switch under the hood upward
c::> fig . 160. This releases the catch .
.. Open the hood.
A WARNING
Hot engine coolant can burn you.
- To reduce the r isk of being burned, never
open the hood if you see or hear steam or
coolant escaping from the engine compa rt­
ment. Wait until no steam or coolant can be
Checking and Filling
seen or heard before carefully opening the
hood .
Closing the engine hood
.. Pull the hood down until the pressure from the
struts is reduced.
"' Let the hood
drop down and latch in place. Do
not try to push it shut;
it may fa il to engage
c::> &. -
A WARNING
A hood that is not comp letely latched could
fly up and block your view while driving.
- When you close the engine hood, check it to
make sure the safety catch has properly en­
gaged . The hood should be flush with the
surrounding vehicle body parts.
- If you notice while driv ing that the hood is
not secured properly, stop at once and close
it.
Working in the engine compartment
Be especially careful whenever you work in the
engine compartment.
-
Whenever you must perform any work in the
engine compartment, for example checking and
filling different fluids , there i s a risk of injury ,
burns and accidents. To prevent personal injury
always observe the following WARNINGS . The
engine compartment of any vehicle is a hazard­
ous area
c:> .&. .
A WARNING
-
To help avoid injury, before you check any-
thing under the hood:
- Turn off the engine.
- Remove the ignition key .
- Apply the parking brake.
- Move selector lever of automatic transmis-
sion to "P" (Park) .
-Always let the engine cool down. Hot com ­
ponents wi ll burn skin on contact .
- To reduce the risk of being burned, never
open the hood if you see or hear steam o r
coo lant escaping from the engine
187

Checking and Filling
compartment. Wait until no steam or cool­
ant can be seen or heard before carefully
opening the hood.
- Keep children away from the engine com­
partment.
- Never spill fluids on hot engine compo­
nents. They can cause a fire.
- Never touch the radiator fan. The auxiliary
electric fan is temperature controlled and
can switch on suddenly.
- Never open the coolant reservoir cap when
the engine is still warm . The coolant system
is pressurized and hot coolant could spray
out .
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the coolant reservoir .
- Do not remove the engine cover under any
circumstances . This increases the risk of
burns .
- If work on the fuel system or the electrical
system is necessary :
= Always disconnect the battery.
- Never smoke or work near heaters or open
flames. Fluids in the engine compartment
could start a fire.
- Keep an approved fire extinguisher imme­
diately available.
- To avoid electrical shock and personal injury
while the engine is running or being started,
never touch:
- Ignition cables
- Other components of the high voltage
electronic ignition system.
- If you must perform a check or repair with
the engine running:
- First, fully apply the parking brake, move
selector lever of automatic transmission
to "P" (Park) .
- Always use extreme caution to prevent
clothing, jewelry, or long hair from getting
188
caught in the radiator fan, V-belts or other
moving parts, or from contacting hot
parts. Tie back hair before starting, and do
not wear clothing that will hang or droop
into the engine.
- Minimize exposure to emission and chemi­
cal hazards
¢ A .
A WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm. In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms.
Wash hands after handling.
([) Note
When adding fluids, always make sure that
they are poured into the proper container or
filler opening, otherwise serious damage to
vehicle systems will occur.
@ For the sake of the environment
To detect leaks in time, inspect the vehicle
floor pan from underneath regularly. If you
see spots from oil or other vehicle fluids, have
your vehicle inspected by an authorized Audi dealer .

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Check in g and Fillin g
Engine compartment
Engine compartment
These are the most important items that you can check.
Fig. 161 Typical layout for containers and eng ine oil filler cap
(D Coolant expansion tank (.J-) .. .. .
@ Jump start point(+) under a cover
@ Engine oil filler cap(~) .... .. .
@ Jump start point(-) with hex head
screw . ............... ...... .
® Brake fluid reservoir ((0) .. .. .. .
@ Windshield/headlight* washer con-
tainer
(Q) .................. .
&, WARNING
193
198,229
191
198,229 195
200
Before you check anything in the engine com­
pa rtment, always read and heed all WARN­
INGS
~ .&. in Working in the engine compart­
ment on page 187 .
Engine oil
Engine oil specifications
The engine oil used must conform to exact speci­
fications.
T he service interval disp lay in the instr ument
cluster of your vehicle will inform you when it is
time for an oi l change. We recommend that you
have your oil changed by an authorized A udi Serv ­
ice Advisor .
If you have to top off the o il between o il changes,
use the Audi oil qua lity standard specified in the
table .
Audi oil quality standard
G as oline
VW S02 00 or
eng ine vw 504 00
1 8 9