|This article needs additional citations for verification. (May 2014)|
Automatic lubrication (also called autolub or auto-lub) refers to a lubrication system where 2 stroke oil is automatically mixed with fuel and manual pre-mixing of fuel and 2 stroke oil is not needed. Occasional filling up of the 2 stroke oil reservoir is needed.
This system is popular with the users of 2 stroke engine, specially motorcycles as it eliminates the inconvenience and messiness of pre-mixing fuel and 2 stroke oil. Vespa Sprint is an example where pre-mixing of 2 stroke oil is required. Automatic lubrication was introduced for motorcycles by Velocette in 1913.
An example of application of automatic lubrication system is Suzuki AX100 motorcycle. The motorcycle has a separate oil reservoir on its right side which supplies the cylinder with 2 stroke oil proportional to acceleration.
Advantages of autolube
- Consistent lubrication and oil consumption is reduced greatly
- More effective lubrication results because the oil enters the engine in larger size droplets
- There is much less unwanted carbon deposited on the spark plugs, cylinder heads, pistons and exhaust system.
- There is much less exhaust smoke
- Refueling is simplified
Disdvantages of autolube
- The system is more complicated compared to manual pre-mixing, although it is easier for the end user.
- For any reason, if the 2 stroke oil pump fails to operate properly, chance of damaging the engine is very high.
- 2 stroke oil tank in a scooters or motorcycles is usually hidden from direct view of the rider and needs filling up occasionally. Without any indicator to indicate oil level, it is possible for a novice rider to forget to fill up the 2 stroke oil tank. This can end up starving the engine of 2 stroke oil and cause damage.
- Mike Waller (September 1986), "Deja vu: British author Mike Waller reminds us that high tech isn't always new tech", American Motorcyclist (American Motorcyclist Association): 15