From what I know, all diesel engines consume a certain amount of engine oil over a period of time. Nagpachange oil kasi ako last 3000kms. I maintain the dipstick oil level between the min and the max. Nung tiningnan ko yesterday, bumaba ng mga 1mm compared before nung bagong change oil ako. Is this normal considering tumakbo na ako ng 3,000kms from my last oil change? If it is, do i need to put additional oil kahit na within range pa rin ang level?

My ride is 4d56 powered nga pala..normally aspirated

Kayo, ano experience ninyo and how much oil do you add and how often? Pls help me...NAPAPARANOID AKO!!!