Question lang peeps, specially to our resident chemist rsnald:

Yung change oil every 5,000 kilometers make sense kasi nasusunog naman talaga ang langis as you use it and its lubricating properties deteriorate. Ang tanong ko lang, advisable ba talaga magpalit nang langis (for both gasoline & diesel engines) every 3 months kung bihira naman magamit yung sasakyan? Sabi kasi sa kasa eh 5k or 3 months daw (whichever comes first) dapat palit na.

salamat..