20 Billion
The consumption of lubricating oil for a diesel engine depends on the operating conditions and the design of the engine. There are some averages depending on the year of the engine. Pre 1980's engine are around 25% of fuel consumption. Pre 1990 engines are around 20% of fuel consumption and more recently built diesel engines are around 1% of fuel consumption.
The 2006 Audi TT has 20 valves.
The 2003 Audi TT has 20 valves.
The 2002 Audi TT has 20 valves.
The 2001 Audi TT has 20 valves.
The 2004 Audi A4 has 20 valves.
The 2005 Audi A4 has 20 valves.
The 2004 Audi TT has 20 valves.
The 2001 Audi A4 has 20 valves.
The 2005 Audi TT has 20 valves.
The 2003 Audi A4 has 20 valves.