BMW X5 2018 Owner's Manual page 227

If drivability problems are encountered, we rec‐
ommend switching to a high quality gasoline
brand and a higher octane grade — AKI num‐
ber — for a few tank fills. To avoid harmful en‐
gine deposits, it is highly recommended to
purchase gasoline from Top Tier retailers.
Failure to comply with these recommendations
may result in the need for unscheduled main‐
tenance.◀
Recommended fuel grade
BMW recommends AKI 91.
Minimum fuel grade
BMW recommends AKI 89.
If you use gasoline with this minimum AKI Rat‐
ing, the engine may produce knocking sounds
when starting at high external temperatures.
This has no effect on the engine life.
Diesel
Safety information
NOTE
Do not press the Start/Stop button after
refueling with the wrong fuel. There is a risk of
damage to property.
Follow the following for diesel engines:
▷ Use only Ultra-Low Sulfur Diesel.
▷ Do not refuel with pure methyl ester.
▷ Only refuel with biodiesel with a maximum
of B5/5 % according to ASTM D975.
▷ Do not use gasoline.
▷ The vehicle manufacturer recommends
only using diesel additives which have
been classified as suitable.
Do not press the Start/Stop button after refuel‐
ing with the wrong fuel. Contact a dealer's
service center or another qualified service cen‐
ter or repair shop.◀
Online Edition for Part no. 01402983801 - X/17
Fuel
Low-Sulfur Diesel
The engine of your BMW is designed for diesel
with low sulfur content:
Ultra-Low Sulfur Diesel ASTM D 975-xx.
xx: comply with the current standard in each
case.
Use only Ultra-Low Sulfur Diesel.
The fraction of biodiesel in the fuel must not
exceed 5 %, referred to as B5. Do not use gas‐
oline. If you do fill the tank with the wrong fuel,
for instance gasoline, do not start the engine
as this may damage the engine.
In the case of incorrect refueling, contact a
dealer's service center or another qualified
service center or repair shop or Roadside As‐
sistance.
If the fuel pump nozzle does not fit in the filler
pipe of your BMW, please check to ensure that
you are refueling at a diesel fuel pump that is
equipped with a diesel fuel pump nozzle.
In the event the Ultra-Low Sulfur Diesel fuel
cannot be fully inserted into the fuel filler neck,
please contact BMW Roadside Assistance for
instructions on how to add fuel.
For additional information regarding Roadside
Assistance, refer to the Owner's Manual for
Navigation, Entertainment and Communica‐
tion.
Mobility
227