2T is a lubricant, has to be topped up about once every 2 months
(depending on ur usage..this is for my case)
What you must change is the engine oil, normally change at
1000km,3000km,6000km,9000km then after that change every 6000km or
when u got too much $$ 
Don't save on 2T and engine oil, buy better quality ones; ur engine
will be in a better condition.
Also, at abt 22000km should wash valve..
Quite a lot of minor stuff here and there, you'll learn along the
way; When you go motor shop, talk to the mechanics, they'll teach
you some stuff as well.
I'm no expert but hope this is helpful.
