While Flushing the Engine Oil on 28th March 2017, and since the Mechanic opened the engine Cover to see the condition of any carbon deposit( of course my 19 yrs Maruti 800 DX has been maintained nicely from time to time), glad to observe that there was no deposit or sludge whatsoever.
Out of curiosity, I asked him to check the Timing Belt, though my car clocked only about 54000 km in these 19 yrs, as my usage is very less in the past 4 yrs limited to city use only. I did read that the life of Timing Belt is around 1 lac km but most of the mechanic say better to change it after 50,000kms. I did observe a small crack ( very small and mechanic said it is not dangerous) but I forced him to change it and we got MGP- JK costing Rs 830. Normally they charge anything from Rs 400-500 for changing this belt. But he did not charge me anything extra for this change, as it was almost a full day job for him to flush the oil and change engine oil, change spark plus, Point condenser, fuel n oil filter, clean the air filter, change fan belt, servicing of all brake pads, cynd assbly , greasing of caliper etc.
So it is always advisable to check the Timing Belt after clocking 50000 km.