Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold
| Fuel | |
Petrol engines | |
316i |
unleaded, not worse than AI 95 |
318i |
unleaded, not worse than AI 95 |
| 318i | unleaded, not worse than AI 983) |
| 323i | unleaded, not worse than AI 983) |
| 328i | unleaded, not worse than AI 983) |
| 330i | unleaded, not worse than AI 983) |
| M3 | unleaded, not worse than AI 983) |
3) It is possible to refuel with AI 95 gasoline with a slight decrease in engine power. AI 91 can be used only in exceptional cases. | |
Diesel engines | |
| Diesel fuel according to DIN EN 590 | Cetane number not less than 49 |
Do not use biodiesel (methyl ester of rapeseed oil) | |
The cetane number characterizes the ability of diesel fuel to self-ignite. | |
Operation in winter conditions | |
winter diesel fuel, which, depending on its brand, ensures uninterrupted engine operation at temperatures down to -15°C or down to -22°C. | |
Fuel filter heating | |
The vehicle is equipped with a fuel filter heating device. Thanks to this, fuel designed for use at temperatures down to -15°C can be used at temperatures down to approximately -25°C. | |
| From -9 to -15°C | 10% |
| From -15 to -25°C | 30% |
| Below -25°C | 50% |
When the outside air temperature drops below -20°Cwinter add viscosity reducer or kerosene to diesel fuel (in % of total volume) | |
| From -20 to -26°C | 10% |
| From -26 to -31°C | 30% |
| Below -31°C | 50% |
Fuel tank capacity | |
| Volume | 63 l |
| including reserve stock | 8 l |
Engine management system | |
316i | BMS 46 |
318i | BMS 46 |
| 318i | Siemens MS 42.0 |
| 323i | Siemens MS 42.0 |
| 328i | Siemens MS 42.0 |
| 320d | DDE Bosch 3.0 |
| 330d | DDE Bosch 3.0 |
BMS - BMW engine management system. | |
MS - engine management system (Motronic). | |
DDE - digital diesel engine control system. | |
Tightening forces of threaded connections | |
Tightening torques for fasteners are given in the text of the Chapter and in some illustrations*. | |
Exhaust system | |
| Intake pipe to exhaust manifold | 30 Nm |
| Triangular flange mounting | 20 Nm |
| Additional muffler clamp | 15 Nm |
| Muffler holder for manual transmission, thread M8 | 20 Nm |
| Bottom mounting strips | 20 Nm |
Exhaust manifold | |
Models 316i, 318i, 320d | |
| M6 | 10 Nm |
| M7 | 15 Nm |
Models 320i, 323i, 328i | |
| M6 | 10 Nm |
| M7 | 20 Nm |
The fuel system consists of a fuel tank, fuel lines, filter, fuel pump and fuel injection system.
The fuel tank has two chambers. The tank is located under the rear seats. The available fuel supply is shown to the driver on the instrument panel. Moreover, the fuel supply for each chamber is measured by a separate sensor. The microprocessor in the instrument panel unit calculates the current fuel content based on injection pulses, driving speed and electrical signals from the lever sensor.
The fuel tank is ventilated through a closed air removal system. In a gasoline engine, harmful gasoline vapors are collected in the adsorber and fed under control to the engine.
Techniques for economical operation of a car
Driving style has a significant impact on fuel consumption. Here are some tips for smart car operation:
- After starting the engine, move off immediately, even if it is in cold weather.
- If the vehicle is stopped for more than 40 seconds, turn off the engine.
- Always drive in the highest possible gear.
- When driving long distances, maintain a steady speed whenever possible. Avoid driving at high speeds. Drive carefully. Do not brake unnecessarily.
- Do not carry unnecessary cargo on your vehicle. If possible, remove any luggage racks installed on your vehicle, such as those on the roof.
- Check the air pressure in your tires. Do not allow the pressure to drop too much.