Seat ibiza Owner's Manual page 133

Properties of RME
• RME is chemically produced from vegetable oil (predominantly
rapeseed oil) in a process whereby the oil is mixed with methanol
and converted, via a catalyst, into RME.
• RME is almost totally sulfur free. The combustion of RME thus
emits practically no sulfur dioxide (SO
• Exhaust gas contains less
– carbon monoxide
– hydrocarbons
– particles (i.e. soot)
than with conventional diesel fuel.
All emission values are lower than legal requirements.
• RME fuel is biodegradable.
• Performance may be slightly lower.
• Fuel consumption may be slightly higher.
• RME can be used in temperatures down to approximately –10 °C.
• Diesel fuel must be added at ambient temperatures of less than
–10 °C to prevent deterioration to the biodiesel. The mixing ratio
of diesel to biodiesel must be approximately 50:50.
I I f f t t h h e e R R M M E E r r a a t t i i o o e e x x c c e e e e d d s s 5 5 0 0 % % , , t t o o o o m m u u c c h h s s m m o o k k e e m m a a y y b b e e f f o o r r m m e e d d . .
• During the summer months, RME may be mixed with diesel at
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any ratio.
Safety First
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Controls and equipment
Driving in winter
When using summer Diesel trouble may be experienced at
temperatures below
0 °C because the fuel thickens due to wax separation.
For this reason winter Diesel which is more resistant to cold is sold
during the winter in some countries, and this works correctly down
to between –15 °C and –22 °C approximately, depending on the
brand of fuel used.
The biodiesel available in countries with different climactic
conditions usually has different temperature characteristics.
Technical Service Centres or service stations in each country can
inform you of the specific characteristics of the respective diesel.
Filter preheating
The vehicle is fitted with a filter preheater. This will ensure that the
fuel system will remain operational down to about –25 °C,
provided that winter Diesel which is cold resistant down to –15 °C
is used.
If, at temperatures below –25 °C the fuel is waxed to such an
extent that the engine will not start it is sufficient to place the
vehicle in a warm enclosure for a while.
Fuel a a d d d d i i t t i i v v e e s s (anti-waxing agent), petrol and similar fluids must
n n o o t t be mixed with Diesel fuel.
Tips and Maintenance
Refuelling
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Technical Data
131
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