Lubrication System Engineering

Lubrication System Filtration

How engine oil cleanliness codes determine bearing life — the ISO 4406 target framework for lube circuits, oil contamination pathways, and bypass valve engineering.

Oil Analysis Methods

ICP-OES wear metal spectrometry, TAN/TBN acid-base monitoring, FTIR oxidation detection, and Karl Fischer water content — complete oil condition monitoring methodology.

Filter Media Science

Cellulose versus synthetic versus glass-fibre composite media: structural differences, Beta ratio stability under dynamic conditions, and media selection for extended drain intervals.

SAE J1858 Lube Filter Specification

Full-flow lube oil filter performance requirements by service category — bypass valve thresholds, anti-drain back requirements, and efficiency specifications.

ASTM D5185 Oil Analysis

ICP-OES methodology for wear metal and contaminant measurement in used engine oil — the primary analytical method for lubrication condition monitoring programs.

Service Interval Engineering

Calculate oil filter service intervals based on dirt-holding capacity, flow rate, and contamination loading conditions.

Lube Oil Circuit

Annotated diagram of engine lubrication circuit: oil pump, main gallery, filter assembly, bypass valve, and bearing supply pathways.

Service Interval Engineering

Condition-based versus time-based maintenance intervals — how oil analysis data informs drain interval optimisation and when fixed intervals create premature or overdue replacements.

Multi-Pass vs Single-Pass Filter Testing

Why multi-pass ISO 16889 testing replaces single-pass methods — the engineering rationale for Beta ratio over gravimetric efficiency for lube filter specifications.