octane VOLKSWAGEN JETTA 2008 Owners Manual

Booklet 3.2 Tips and Advice
Fuel supply
Applies lo ve hicl es: wi th a gasoline engi ne
Gasoline
The co rrect gaso line grades are lisred on a sti cke r inside the Juel fill er flap.
Octane roting
Octane rating indicates gaso line's a bility to re­
s ist en gin e da ma ging "k noc k" ca used by pre- ig­
n iti on. Therefo re, buyin g the correc t grade of
gaso line is very
to help p reven t pos­
s ibl e e ngin e damage and a loss of e ngin e perfor­
man ce.
T he recommende d gaso line oc ta ne rating for
yo ur eng ine ca n b e fo und on a la b el loca ted on
th e in sid e of the fu el fill er flap. This rat ing m ay
b e s pecifie d as AKI (CLC) o r HO N (ROZ).
Gaso lines mo st co mm onl y use d in the Unite d
States and
hav e th e fo llow ing octan e
ra tin gs that can usually be found on th e fill er
pump :
• Premi um Graci e: 91
96 AKI
• Reg ular
87 90 AK I
Unlead ed gasoline
Unleaded gasoline is ava ilab le throu ghout t he
U SA, C anada, and in most European countri es.
We recom men d th at yo u do not take your ve­
h icle
oxyge nates) if the
bl end ed mixture mee ts th e fo llowing criteria :
Blend of gaso lin e methanol (wood alcohol or
meth yl alco hol):
• Anti -kn ock ind ex mu st be 87 or hi gh er,
• Ble nd mu st co ntain no mor e th an 3% meth ­
a n o l,
• 131encl must co ntai n m ore tha n 2% co-so l­
ve nts.
Bl end of gasoline a nd ethan ol ( gra in alco hol or
e th yl alco hol) :
• Anti-knock index mu st b e 87 AK I or higher,
32 Checking and Filling
• Ble nd mu st n ot co ntain mor e than HJ% eth­
ano l.
Bl end of gaso line a nd MTBE:
• Anti -knock index must b e 87 AK I or high er,
•
m ust contain not more t han 15% MTB E.
Seasonally adjusted gasoline
Many gasolines are blen ded perfor m espe­
cia lly well for win te r or summer driv in g. D urin g
seaso nal ch ange-over, we su gges t that you fill up
busy sta tio ns where the seaso nal adju st­
ment is more like ly be mad e in tim e.
Note
• Do not use any fuel w ith octan e ra tings lowe r
than 07 /\K l or 9 1 otherw ise expensive en ­
g in e damage w ill occur.
• Do not use lea ded gaso lin e! Usin g le aded
gaso line
w ill seve re ly da mage vehicle 's cat­
a lyt ic co nverte r and its abilit y to re du ce ex hau st
e mi ssio ns.
• Met hanol fue ls th at do not meet th ese re­
q uir eme nts ma y ca use c orro sio n and dam age to
p las tic a nd rubber component s in th e fu el
sys te m .
• Do not u se fuels that fa il to meet the criteria
s p ecified above.
• If yo u are unable to dete rmine wheth er or
n ot
parti cul ar f uel bl en d m eets the sp eci fica ­
t io ns above, ask your service s ta tion o r its fu el
s u pplie r.
• Do not use f uel for whic h th e con te nt s
ca nn ot be identifie d.
• Fuel system damage and performan ce pro b­
l e ms r esultin g from the use of f uels diffe re nt
from those s peci fied above are
11 0 1 th e respo nsi­
bilit y of Vo lkswage n and are 1101 covered under
th e New Ve hicle or th e Emission Co ntrol
War ra n ties.