Originally Posted by klxdrt
Hi,
PDF from Subaru indicates during my "2108 Subaru Legacy 2.5 cu, 9200 mi" map UPDATE-engine could be IDLING up to 60 min. I get an uneasy feeling about this as I have driving & working on cars for 65 yr & usually drive my cars 150-200 thousand mi.
Is this IDLING going to cause future engine problems or is a normal operation for modern engines & oil?
2018 Subaru Legacy 2.5 cu takes 5 qt. 0-20w syn oil.
Regards,
klxdrt
No problem. The old complaints against extended idling were when engines were carbureted and had sliding cam followers. Your engine has neither. The carbs would slobber excess fuel into the engine, diluting the oil, causing it to thin out. The slider tappets would suffer at low speeds because spring force overwhelms dynamic force at idle speed, causing high contact stress.