two-stroke oil we get 4 different quality ratings, which are based on the JASO (Japanese Automotive Standards Org.) scale:
JASO-FA very basic single grade SAE30 or SAE40 based 2-stroke oil (premix only)
JASO-FB Used for most premix industrial 2-stroke engines and scooters
JASO-FC "Low ash burn" used for separate oil injection and most outboard motors. this oil can be mineral or part synthetic
JASO-FD This is fully synthetic 2-stroke oil for racing engines. It is not suitable for mixing with diesel, because a) too expensive and b) not compatible with cats and particle filters.
For All Series LR and Disco1 and 2 a Jaso-FB rated oil is fine. For Disco 3 and 4 a JASO-FC rated oil has to be used, such as the Fuchs oil.
Now in order to provide better lubrication but at the same time also better power delivery from the engines, the ideal solution seems to be to add 2-stroke oil (see above) in a mixing ratio of 1:200 i.e. 500ml per 100lt diesel.
This will increase the cetane rating by 3-5 points and will provide the following benefits:
1. Much better and more complete combustion (lower EGT)
2. Self cleaning of engine internals, as JASO-FC compliant 2-stroke oil burns cleaner and better than diesel. Due to this there is also about a 3-5% gain in fuel economy.
3. Sufficient lubrication of high pressure components in the diesel injection system.
4. Much quieter starting in the morning and smoother running
5. Reduced smoking
6. In engines with particle filter "burn free" action is reduced from every 600-700km to between every 1200-2000km
7. Much lower "clowd content" of diesel exhaust fumes typically from 0.95 down to 0.47. This is measured in Germany at the TüV.
8. Large government fleets in Germany report fleet reliability (MB Cdi, BMW CRD, Audi Tdi etc. etc. to exceed 400'000km WITHOUT VHP pump or injector failures
So the above deliberations give some well documented indication, why adding 2-stroke oil to diesel is such a clever move.
I run my 1999 Disco1 300Tdi on Sasol 50ppm diesel with a 1:200 mixing ratio of Sasol Corwa-120 2-stroke oil added.
I get on long distance travel fully loaded between 8.9 to 10.8lt/100km depending on how heavy my right foot is. I have done a number of trips with 1000km per (standard capacity) tank.
So now that I have kickstarted this thread, lets hear from the members out there.
Disclaimer:
This is my personal view and in no way whatsoever serves as an instruction or official guide line. All product names mentioned are the property and/or trade mark of their relevant owners.
__________________
with kind regards
George Bosch
Зимата по принцип си палят трудно, ама не заради нафтата 
