Cum listen listen listen,

Plotong set 1k, 5k & 10k free servis is meant for furture warranty purposes. Its not about void or no void warranty, is about maintain the new engine clean to avoid FUTURE complication. Why 1k servis? Its bcoz all engine parts are new, during this run in period, there will be lots of grinding inside the engine, as metal surface rubbing happened, expect metal dust mixed in the engine oil(so as gear oil). So, after 1k run in period your oil filter will be suckalot with metal dust liao hence the 1k servis is applied. 5k will be the same reason, so as 10k. Maintain engine cleaniness in the early stage can avoid many complication in future, such as hutan bakar white smoke/black smoke.

For me, I dun really care whether its semi synthetic or fully synthetic. Avoid metal dust is more critical its not wrong to say synthetic oil can last 10k, the thing is it will be too dirty.