Coolant – BMW 135i Convertible 2011 User Manual
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The engine oil grade is a decisive factor for the
service life of the engine.
Approved engine oils can be found in the fol-
lowing specification:
Approved engine oils belong to the viscosity
classes SAE 0W-40, SAE 0W-30, SAE 5W-40,
and SAE 5W-30.
Alternative oil grades
If approved oils are not available, you can use
quantities of up to 1 US quart/1 liter of another
oil with the following specifications:
API SM or higher
Coolant
Do not add coolant to the cooling system
when the engine is hot. Escaping coolant
can cause burns.
<
Coolant consists of half water and half additive.
Not all commercially available additives are suit-
able for your BMW. Ask your BMW center for
suitable additives.
Only use suitable additives; otherwise,
engine damage may result. Because
additives are harmful to your health, it is impor-
tant to follow the instructions on the contain-
ers.
<
Comply with the appropriate environ-
mental protection regulations when dis-
posing of coolant additives.
<
Checking coolant level
1.
Do not open the engine hood before the
engine has cooled down.
2.
Turn the cap of the expansion tank a little
counterclockwise to allow any accumulated
pressure to escape, then continue turning
to open.
3.
The coolant level is correct if it is between
the maximum and minimum marks in the
filler neck, refer also to the diagram next to
the filler neck.
4.
If the coolant is low, slowly add coolant up to
the specified level; do not overfill.
5.
Turn the cap until there is an audible click.
6.
Have the reason for the coolant loss elimi-
nated as soon as possible.
Gasoline engine
Preferred:
BMW Longlife-01
BMW Longlife-01 FE
Alternative:
BMW Longlife-98
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