*Screw Compressor Oil 25L* = Special oil for screw air compressor. Not engine oil. If you use engine oil, screw airend will die ₦1M.
Screw oil is synthetic, anti-foam, high temp 100°C+.
### *Types of Screw
**Full Synthetic PAO** 6000-8000 hrs Synthetic ₦140k – ₦190k ATLAS, KAESER, IR Long life, cold start
**OEM Atlas Roto Z / Kaeser Sigma** 8000 hrs Full Synthetic ₦220k – ₦350k Atlas / Kaeser only
### *How Much Oil Your Screw Needs*
Screw HP Oil Capacity 25L Can Do How Many Changes?
**10HP Screw** 8-10L 25L = 2 changes + spare
**15HP Screw** 12-15L 25L = 1 change + 10L spare
**20HP Screw** 18-22L 25L = 1 change
**30HP Screw** 25-30L 25L = 1 change, buy 5L extra
**40HP Screw** 35-40L Need 40L
### *When to Change – Don’t Guess*
Oil Type Change Hours In Lagos Dust + 35°C Check
**Mineral** 2000 hrs 1500 hrs 8hrs/day = every 6 months
**Semi-Synthetic** 4000 hrs 3000 hrs 8hrs/day = every 12 months
**Full Synthetic** 8000 hrs 6000 hrs 8hrs/day = every 2 years
*Check oil*: Look at sight glass. If black or milky white = change immediately. Milky = water = airend rust.
### *Engine Oil vs Screw Oil – Why Engine Oil Kills*
**Engine Oil 15W40 ₦40k 25L** **Screw Oil 46 ₦188k 25L**
**Temp** Burns at 90°C, carbon Stable at 110°C
**Foam** Foams, airend cavitation Anti-foam
**Water Separation** Mixes with water Separates water to drain
**Life** 500hrs in screw then sludge 4000hrs
**Result** Airend jam repair Airend 30,000hrs life
*Don’t use engine oil to save ₦80k, you will
### *Key Tips*
1. *Viscosity 46*: For Nigeria hot, buy ISO VG 46. VG 32 for cold Europe. 46 is correct for Lagos 35°C
2. *Don’t mix types*: If changing from mineral to synthetic, flush system with 2L new oil first
3. *Filter change*: Always change oil filter when changing oil – ₦12k-₦20k. Old filter contaminates new oil
4. *Fake oil*: Many refill engine oil into screw bottle. Check seal + hologram. Buy from known dealer
5. *Storage*: Keep 25L drum closed. Dust + water kills oil
### *Oil + Filters Kit Price*
Kit for 10-20HP Price
**25L Semi-Synthetic + Oil Filter + Air Filter + Separator** = **₦188k** full service
*Maintenance*: Change oil + oil filter + air filter every 2000-4000hrs + check air-oil separator
What HP is your screw compressor and what oil are you using now? If you tell me brand + hours, I’ll tell you if you need mineral, semi, or full synthetic so you don’t waste money or kill airend.