Sunice P46 is a synthetic polyalkylene glycol (PAG) compressor oil made in Japan by Japan Sun Oil Company, Ltd. for automotive air conditioning systems with belt-driven compressors. It is formulated to work with either R134a or R1234yf refrigerant, so service teams and workshops can carry one PAG 46 grade for both systems. Sunice P46 is supplied in 250 ml, 1 L and 4 L packs and is used for compressor top-ups, system recharges and compressor replacement fills.
Sunice P46 is a synthetic polyalkylene glycol (PAG) lubricant from Japan Sun Oil Company, Ltd. (日本サン石油株式会社), a Japanese manufacturer of refrigeration and automotive A/C lubricants based in Tokyo. PAG is the standard oil family for belt-driven automotive A/C compressors because of its lubricity and its compatibility with the refrigerant circuit. Sunice is a registered trademark of Japan Sun Oil Company, Ltd., and P46 is the company's latest PAG grade, developed for the changeover from R134a to R1234yf: its chemical structure is designed to remain stable and give reliable compressor protection in systems charged with either refrigerant. P46 is supplied for the mechanical compressor types most common in passenger vehicles, including swash-plate and piston designs, and is available in 250 ml, 1 L and 4 L packs.
Sunice P46 is a service fill for R134a systems that specify a PAG 46 oil, covering the large installed base of belt-driven compressors in passenger and light commercial vehicles.
The same P46 grade serves newer vehicles charged with R1234yf, simplifying stock for workshops that service both refrigerant generations.
P46 is used when a compressor is replaced or an A/C system is opened for repair, where the correct oil charge must be restored before the system is evacuated and recharged.
Because one grade covers R134a and R1234yf, maintenance teams can keep a single PAG 46 line item instead of stocking separate oils for each refrigerant.
Before you order: confirm the refrigerant charge and the compressor type fitted to the vehicle, and check the oil specification called out by the vehicle or compressor manufacturer. Sunice P46 is designed for belt-driven mechanical compressors — for electrically driven compressors on EV and hybrid vehicles, use an EV-rated oil such as DENSO ND-OIL 11 POE.
| Property | Specification | Significance |
|---|---|---|
| Base Oil Type | Synthetic Polyalkylene Glycol (PAG) | Standard lubricant family for belt-driven automotive A/C compressors |
| ISO Viscosity Grade | VG 46 | PAG 46 class used across R134a and R1234yf mechanical compressor applications |
| Kinematic Viscosity at 40 °C | 46.3 mm2/s | Confirms the ISO VG 46 grade under the standard reference temperature |
| Kinematic Viscosity at 100 °C | 9.0 mm2/s | Indicates film retention at high discharge temperatures |
| Pour Point | -45.0 °C | Low-temperature fluidity supports cold-weather A/C operation |
| Flash Point (COC) | 202 °C | Resists oil breakdown at elevated operating temperatures |
| Density at 15 °C | 1.012 g/cm3 | Typical PAG density range for automotive A/C oils |
| Refrigerant Compatibility | R134a (from -40 °C), R1234yf (from -20 °C) | One grade covers both refrigerant generations within its operating envelope |
| Compressor Types | Swash-plate and piston (reciprocating), belt-driven | Covers the dominant mechanical compressor designs in passenger vehicles |
Specifications are supplier reference data from the Japan Sun Oil Company, Ltd. product information sheet for Sunice P46, verified 2026-09-07. Request the current TDS with your inquiry for lot-level confirmation.
Viscosity class and compressor drive type are the first selection criteria for automotive A/C oil. The table below compares the PAG and POE grades in the Qishanr range against typical vehicle duty; always use the oil specified by the vehicle or compressor manufacturer.
| Product | Oil Type | Refrigerant Focus | Compressor Context |
|---|---|---|---|
| Sunice P46 (this product) | PAG 46 | R134a and R1234yf | Belt-driven swash-plate and piston compressors |
| DENSO ND-OIL 8 | PAG 46 | R134a | Belt-driven piston, rotary, scroll and sliding-vane compressors |
| DENSO ND-OIL 12 | PAG 46 | R1234yf, backward-compatible with R134a | Belt-driven mechanical compressors in R1234yf systems |
| DENSO ND-OIL 9 | PAG 100 | R134a | Through-vane and scroll compressors requiring PAG 100 |
| DENSO ND-OIL 11 | POE | R134a and R1234yf | Electrically driven compressors on EV and hybrid vehicles |
Oil selection must follow the vehicle and compressor manufacturer specification. If the under-hood label or service manual lists a specific oil, confirm the grade against that recommendation rather than substituting.
Ordering the right A/C oil is a five-step process that protects compressor warranty and service results.
Handling note: PAG oils absorb moisture quickly. Keep the container sealed and minimise exposure to ambient air when charging a system, and follow the vehicle manufacturer procedure for oil charge quantity.
Specification source: The technical values on this page are supplier reference data from the Japan Sun Oil Company, Ltd. product information sheet for Sunice P46, verified on 2026-09-07. The current TDS and MSDS are provided with your inquiry for lot-level confirmation.
Application caution: Sunice P46 is designed for belt-driven mechanical compressors. It is not recommended for electrically driven compressors on EV or hybrid vehicles, vane-type compressors, or R12 retrofit systems.
Editorial review: Reviewed by Qishanr Technical Team, 2026-09-07. This page is updated only when specifications, packaging or sourcing information materially change.
A: Sunice P46 is for automotive A/C systems with belt-driven mechanical compressors, including swash-plate and piston (reciprocating) types. It is not recommended for electrically driven compressors on EV and hybrid vehicles, and it is not the grade for vane-type compressors.
A: Sunice P46 is formulated for R134a and R1234yf systems, per the Japan Sun Oil product information sheet: usable with R134a from -40 °C and with R1234yf from -20 °C evaporator temperature. This lets one PAG 46 oil serve both refrigerant generations.
A: No. Electrically driven compressors on EV and hybrid vehicles require dielectric EV-rated oils. Japan Sun Oil does not recommend P46 for electrically driven compressors — for that application see DENSO ND-OIL 11 POE.
A: All three are PAG 46 class oils, but the refrigerant and compressor coverage differs: ND-OIL 8 targets R134a mechanical compressors, ND-OIL 12 targets R1234yf systems with R134a backward compatibility, and Sunice P46 covers both R134a and R1234yf for belt-driven swash-plate and piston compressors. Always confirm the oil grade against the vehicle or compressor specification before substitution.
A: No. Sunice P46 is not a retrofit oil for R12 vehicle air conditioning systems.
A: Do not mix oils of different chemistries. If the residual oil type or condition is unknown, follow the vehicle manufacturer procedure — normally the system is flushed and the compressor oil charge is restored with the specified grade before evacuation and recharge.
A: Sunice P46 is available in 250 ml, 1 L and 4 L packs. For workshop stock or distributor quantities, share your expected monthly consumption and we will confirm pricing, MOQ and lead time.
Sunice P46 gives A/C service teams a dependable Japanese PAG 46 oil for both R134a and R1234yf belt-driven systems. Send your vehicle and refrigerant details for specification confirmation, pricing and delivery.
Send your vehicle refrigerant (R134a or R1234yf), compressor type and required quantity. Our team will confirm the specification, pack size and lead time for your order.
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