
Originally Posted by
jarhead
as per engine oil usage.. i have a w123 240d and we have been using for a more than 15 years already... putting on a synthetic oil for a very old engine isnt that economical... due to wear and tear on the cylinder wall and pistons, etc.. gaps woudl have developed already.. kung sa manual tingnan mo , pwede ang synthetic but that was when it was brand new and maybe 5 years in usage... iv been using a 15w40 grade engine oil before but i noticed that when the egnine got hot enough, the tendecy is that the oil is so thin or too flowing that the engine starts to shake, parang the oil is loosing its lubricancy due to gaps and age of the engine.,, by the way, i havents overhauled my engine yet since we bought it and wasnt overhauled also by the 1st owner... so, i tried using a thicker oil, that way when the engine is hot the oil is still a bit thick and wont be too liquid..
my indicator would be the oil pressure on the dash...once the oil is too liquid for the engine, the pressure drops...