Compressor Oils — Aircol PD, SR, SN for Every Compressor Type

Match the compressor type to the right base oil — mineral for reciprocating, PAO for rotary-screw, diester for high-discharge-temperature service.

Quick Answer

Castrol Aircol PD (mineral) and Aircol SR (synthetic PAO) cover rotary-screw, vane and reciprocating air compressors. Aircol PD is the workhorse for screw compressors at 6000-hour drain intervals; Aircol SR extends drains to 10,000+ hours and tolerates higher discharge temperatures. Castrol Rarus is the gas-compression range. Selection depends on compressor type, discharge temperature, ambient conditions and oil-life expectations.

Product Range

Aircol PD 100 / 150

Mineral reciprocating

Mineral-based high-flash-point oil for reciprocating air compressors.

Aircol SR 46 / 68

PAO synthetic rotary-screw

PAO synthetic for 8000-hour drain rotary-screw compressors.

Aircol SN 68 / 100

Diester synthetic

Diester synthetic for high-temperature reciprocating and for older compressors with carbon-deposit history.

Typical Applications

Reciprocating air compressors (piston)
Rotary-screw oil-flooded compressors
Centrifugal air compressors
Gas compressors (natural gas, process gas)

Why buy from Vasundhara Specialities

As the authorized Castrol industrial distributor for Andhra Pradesh, every drum and pail we supply is sourced directly from Castrol India’s Silvassa, Paharpur and Patalganga plants with full batch traceability. Our Bhimavaram warehouse stocks the complete compressor oils range for 48–72 hour delivery across AP, and our technical team is available on-site for application trials, coolant sampling, and training. Paired with our CoolantCare fluid management programme, you get not just a supplier but a lubrication partner committed to lowering your total cost of lubrication.

Frequently Asked Questions

Can I use Aircol PD in a rotary-screw compressor?

Only for short intervals (1000–2000 hrs). Rotary-screw compressors run hotter and have far more oil-air contact than reciprocating — Aircol SR (PAO) at 8000-hour drain is the right economic choice.

What causes carbon deposits on a compressor's discharge valve?

Oil oxidation at high discharge temperatures. Switch to diester-based Aircol SN if deposits recur; diester has self-cleaning detergency that mineral oils lack.

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