PAG 100 Oil for R134a AC Systems - Each image
PAG 100 Oil for R134a AC Systems image 1
PAG 100 Oil for R134a AC Systems – 8oz Premium Lubricant
PAG 100 Oil for R134a AC Systems – 8oz Premium Lubricant
PAG 100 Oil for R134a AC Systems – 8oz Premium Lubricant
PAG 100 Oil for R134a AC Systems – 8oz Premium Lubricant
PAG 100 Oil for R134a AC Systems – 8oz Premium Lubricant
PAG 100 Oil for R134a AC Systems image 2
PAG 100 Oil for R134a AC Systems - 6 image
PAG 100 Oil for R134a AC Systems - 12 image
Performance
Compressor Oil

PAG 100R134a Compressor Oil · 100 cSt · Standard AC Systems · 8 oz

SKU · 02-0038MPN · HCP1008
PAG 100Made in USA8 ozR134a98 cStASTM Tested
$17.99
Factory-Direct
In stock· ships same business day from Miami
Direct from the manufacturer — Miami HQ, full warranty & tech support included.
Size: 8 oz Bottle
Size: 8 oz Bottle: Each 8 oz Bottle
In stock, ready to ship
Assembled
Tested in Miami
Standard
OEM Spec
Ships
1–2 Days
  • Field-tested by working HVAC technicians
  • Free returns within 30 days
  • Direct manufacturer support — Miami HQ
  • ORDER IN THE NEXT — AND IT SHIPS TODAY FROM MIAMI
USAMADE
Manufactured in America

Blended to OEM compressor lubricant standards in the USA — same plant, same QC every bottle

8OZ
Service Bottle (237 mL)

Single-bottle compressor refill or top-off — covers a full R134a service for most vehicles

R134a
System Compatibility

For R134a systems only. NOT for R1234yf, hybrid, or EV compressors.

ASTMTESTED
Lab-Verified Performance

Tested to ASTM D445, D2270, D92, D97, D2783 — thermal stability, lubricity, oxidation resistance

Why this oil

Right viscosity, right system, right every time.

USA-manufactured PAG compressor oil in the three grades real R134a service work demands. PAG 46 for low-pressure systems, PAG 100 for standard service, PAG 150 for heavy-duty and HVAC applications. Use what the OEM calls for — don't guess.

Match the OEM viscosity spec

R134a compressors are designed for a specific oil viscosity grade — using the wrong one shortens compressor life and reduces cooling efficiency. PAG 46 for lighter automotive systems, PAG 100 for the most common R134a applications, PAG 150 for heavy-duty automotive and light HVAC. Check the OEM service spec; we sell what you actually need.

USA-made, ASTM-tested

Manufactured in the United States to OEM compressor lubricant performance standards. Lab-tested for thermal stability (ASTM D2270), flash point (D92), pour point (D97), and lubricity (D2783). No imported chemistry, no surprise reformulations between batches.

Moisture and acid resistant

PAG-based lubricants resist hydrolytic breakdown — they don't degrade in the presence of water like mineral oils do. The formula prevents acid formation in the compressor, which is the #1 cause of premature compressor failure on poorly serviced R134a systems.

Full Product Description

PAG 100 compressor oil for R-134a automotive A/C systems — the standard viscosity grade for most domestic vehicle R-134a compressors. Premium polyalkylene glycol synthetic lubricant with superior thermal stability, low pour point, and acid-resistant chemistry. The most common PAG grade in service trucks.

HCPRO Performance PAG 100 is an 8 oz / 237 mL standard-viscosity automotive A/C compressor lubricant. ISO VG 100 / SUS 98 at 100°F, specific gravity 0.93, flash point 450°F, pour point -36°F, pH 7. Meets ASTM D445, D2270, D92, D97, D974, D2783, ANSI-ASHRAE 97-1989, and FZG standards. For R-134a A/C systems specifying PAG 100 — most domestic vehicles (GM, Ford, Chrysler) and many imports. NOT for R-1234yf, hybrid, or EV compressors.

Who this oil is for

Auto A/C technicians servicing domestic R-134a vehicles where OEM specifies PAG 100 (most common viscosity grade). Mobile mechanics, fleet service teams, independent repair shops. The go-to bottle for the majority of R-134a service work.

When to use it

During R-134a A/C compressor service when the OEM calls for ISO VG 100. Full compressor refill: 4–8 oz per OEM spec. Top-off after refrigerant recharge: 1–2 oz per circuit. Most domestic vehicle service manuals specify PAG 100 — always verify before injection.

Why PAG 100 vs PAG 46, PAG 150, or POE

PAG 100 is the standard mid-range viscosity for most R-134a domestic vehicles. PAG 46 is for lighter-duty imports; PAG 150 for heavy-duty trucks. POE is for modern R-1234yf, R-410A, and A2L refrigerant systems — not compatible with R-134a PAG systems without proper retrofit. For leak detection in one step, use our PAG 100 UV variant.

Single 8 oz bottle, sealed leak-proof packaging, 2–3 year shelf life unopened. Manufactured in the USA to OEM compressor lubricant performance standards.

Technical specifications

What the manufacturer publishes — verified against the source spec sheets.

Manufactured in the USA to OEM compressor lubricant performance standards. ASTM-tested for thermal stability, oxidation resistance, lubricity, and water tolerance. Match the OEM-specified viscosity grade for your specific compressor.

Type
Polyalkylene Glycol (PAG) compressor oilSynthetic — high VI, low volatility, hydrolytic stability
Manufactured in
United States of AmericaOEM-grade compressor lubricant standards — no imported chemistry
Container size
8 oz / 237 mLSealed leak-proof bottle, 2–3 year shelf life unopened
Viscosity grade
PAG 46, PAG 100, or PAG 150Match the OEM compressor service spec for your system
Refrigerant
R134a systems ONLYNOT for R1234yf, R-32, R-454B, A2L, hybrid, or EV
Vehicle compatibility
Domestic & imported autos, light-duty trucks, light HVAC (PAG 150)Universal R134a compressor compatibility
Flash point
442–455 °F (varies by grade)PAG 46: 442°F · PAG 100: 450°F · PAG 150: 455°F
Pour point
-31 to -36 °F (varies by grade)Cold-weather pump-down without crystallization
Specific gravity
0.93Consistent across all three grades
pH
7 (neutral)Non-corrosive to brass, copper, aluminum compressor internals
Moisture absorption
Low — store sealedHygroscopic to a small degree — keep cap on
Shelf life
2–3 years (sealed)Unopened bottles — once opened, use within service interval
Standards met
ASTM D445 · D2270 · D92 · D97 · D974 · D2783 · ANSI-ASHRAE 97-1989 · FZGTested for thermal stability, lubricity, oxidation resistance, wear protection
In the box

Single-bottle compressor service. Connect the injector, send it through.

PAG 100 Oil for R134a AC Systems – 8oz Premium Lubricant
8 oz / 237 mL PAG Compressor OilSealed leak-proof bottle — viscosity grade printed on label (PAG 46, PAG 100, or PAG 150)
Application + safety insertInjection method, OEM compatibility guidance, and chemical safety information
Customer reviews

What working techs say after putting it on the job.

12,000+ HVAC pros served
4.9★ Average rating
94% Repeat buyers

Replace this with a real customer quote. Aim for 2–4 sentences with specific use case — what vehicle, what viscosity grade, why it solved the problem.

Marcus T.AUTO A/C TECH · MIAMI, FL
On HCPRO Performance PAG Compressor Oil

Replace this with a real customer quote. Aim for 2–4 sentences with specific use case — what vehicle, what viscosity grade, why it solved the problem.

Jorge R.FLEET MECHANIC · DALLAS, TX
On HCPRO Performance PAG Compressor Oil

Replace this with a real customer quote. Aim for 2–4 sentences with specific use case — what vehicle, what viscosity grade, why it solved the problem.

Derrick W.INDEPENDENT SHOP · ATLANTA, GA
On HCPRO Performance PAG Compressor Oil
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Common questions

Answers from the warehouse floor.

Still stuck? Call our techs at 305-720-0044.

Does HCPRO warranty the products?

Yes — every HCPRO product ships with a 1-year limited warranty against manufacturing defects. We'll replace the bottle if it fails to meet stated specs under normal use. See our full warranty terms.

Which viscosity grade does my system need?

Check the OEM service spec for the specific vehicle or compressor. As a general guide: PAG 46 for light-pressure automotive R134a systems (often Asian imports), PAG 100 for standard R134a applications (most common in domestic vehicles and aftermarket), PAG 150 for heavy-duty automotive and light HVAC. When in doubt, use the OEM-specified grade.

Will it work with R1234yf, hybrid, or EV compressors?

No. This is formulated for R134a systems only. R1234yf and A2L refrigerant systems require different oil chemistry (typically POE — see our RPO-32 Synthetic POE). Hybrid and EV A/C compressors require non-conductive ester-based oils. Using PAG in those systems can damage the compressor.

Can I mix viscosity grades (e.g., top off PAG 100 with PAG 46)?

Avoid mixing unless absolutely necessary. Each grade is engineered for a specific operating pressure range — mixing changes the effective viscosity, which can reduce cooling efficiency and shorten compressor life. If you need a universal top-off and don't know what's in the system, use our UV Dye Universal PAG Oil (formulated to blend with PAG 46/100/150 and detect leaks at the same time).

How long does an unopened bottle last?

Shelf life is 2–3 years sealed. PAG oils are hygroscopic (slowly absorb moisture from the air), so always store with the cap tight in a cool, dry place. Once opened, use within the service interval — don't leave half-bottles sitting on the shelf for months.

How much oil should I inject per system?

Per OEM service spec for full compressor replacement (typically 4–8 oz per system depending on vehicle). For routine top-off after recharging, 1–2 oz is standard. Under-filling reduces lubrication and shortens compressor life; over-filling reduces refrigerant flow and cooling. Always reference the specific OEM service manual.

What OEM brands is this equivalent to?

Spec'd to match the major OEM PAG compressor lubricants (Denso, Sanden, Delphi, Visteon, etc.). The ASTM standards on the label (D445, D2270, D92, D97, D974, D2783) are the same ones OEMs use to qualify their lubricants. If a customer asks for a specific brand, our PAG meets the same performance spec at a competitive price.

Will using HCPRO products void my OEM warranty?

No. Under the Magnuson-Moss Warranty Act of 1975, an OEM cannot void your factory warranty for using compatible aftermarket fluids. This oil is spec'd to meet OEM compressor lubricant standards. If a dealer pushes back, contact us and we'll send the documentation.

Can I return an unused bottle?

Yes — free returns within 30 days for unopened bottles in original packaging. Opened bottles can't be returned for resale (chemical product). Read our full return policy.

Do you offer bulk pricing for shops?

Yes. For orders of 6+ bottles we offer trade pricing. Email hcproproductsusa@gmail.com with your business details and we'll send a quote within 24 hours.