তেল পরিবর্তন ব্যবধান ক্যালকুলেটর

The base interval comes from the equipment manufacturer's maintenance manual. Typical values:

• Industrial gearbox: 4000–8000 hours
• Hydraulic system: 2000–4000 hours
• Diesel engine: 250–500 hours
• Compressor: 2000–4000 hours

If unknown, start with 4000 hours for enclosed gear drives and adjust based on conditions.

Temperature is the #1 factor in oil degradation. The Arrhenius rule: every 10°C above the normal operating range (~60°C for mineral oil) approximately halves the remaining oil life.

At 100°C, mineral oil degrades roughly 4× faster than at 60°C. This is why hot-running equipment needs much shorter intervals.

Usually yes. Synthetic oil (PAO, ester) costs 2–4× more per liter but lasts 2–2.5× longer. Net savings come from:

• Fewer oil changes = less downtime
• Better wear protection = longer component life
• Better performance at temperature extremes
• Lower total cost per operating hour in most cases

Oil analysis tests in-service oil samples in a lab for:

• Wear metals (Fe, Cu, Cr) — early failure detection
• Contamination (water, silicon/dust)
• Viscosity change — oxidation indicator
• TAN/TBN — acid/additive depletion

Use for all critical equipment, expensive oil fills, or when operating under severe conditions. Sample at 50–75% of calculated interval.

Yes, significantly. Upgrading from standard 25µm filters to high-efficiency 10µm (β₁₀ ≥ 200) can extend intervals by 20–30%. Adding bypass filtration with 3µm elements can extend intervals even further.

Cleaner oil also means less component wear, so the investment in good filtration pays off doubly.