Quote Originally Posted by perrydel View Post
During my 5,000 kms change oil I used bosch oil filter (AF1 036) and delo 400 motor oil. I noticed that after cold starting, oil warning light take a longer time before it dissapear after my change oil, It takes 2.5 sec. What I did is change the oil filter immediately w/ OEM mitsubishi filter, after that it take only 1 sec. before the warning light gone. Base on expert says engine wear happened during start up. 4d56 engine.
Could it be that you were given a fake bosch filter? The said scenario happens when an oil filter has no drain-back valve, unless not all genuine bosch filters have drain-back valves. Same scenario happened to me because of an el cheapo oil filter.