QSL-68H vs Emkarate RL68H vs CPI Solest 68: POE Oil Cross-Reference Guide

You Need VG68 POE Oil. Your Schedule Cannot Wait 3 Weeks.

Your compressor specification sheet says Emkarate RL68H. The distributor quotes a 3-week lead time and a minimum order that exceeds your immediate need. You cannot delay the maintenance window, and you cannot risk using an unverified substitute.

Qishanr QSL-68H is a direct cross-reference replacement for Emkarate RL68H and CPI Solest 68. It matches the ISO VG68 polyol ester (POE) specification. It ships in 7 days. And its pour point of -45°C outperforms both RL68H (-39°C) and Solest 68 (-43°C) for low-temperature oil return.

This guide provides the complete technical specification comparison, commercial terms, and compressor compatibility data you need to make a documented procurement decision. For background on why HFC systems require POE oil in the first place, see: Complete Guide to Refrigeration Oil Compatibility with HFC Refrigerants.

Technical Specification Comparison: QSL-68H vs RL68H vs Solest 68

The table below compares all three VG68 POE oils using standardized test methods. QSL-68H data is from GB/T testing (Chinese national standards, equivalent to ASTM/ISO). RL68H data is from manufacturer-published ASTM D445/D92/D97 specifications. Solest 68 data is from manufacturer-published ASTM specifications.

All three oils fall within ISO VG68 tolerance (卤10% of nominal 68 cSt at 40°C). The operationally decisive difference is pour point: QSL-68H at -45°C provides a 6°C colder operating margin than RL68H (-39°C). In freezer and cold storage applications with evaporator temperatures below -30°C, this margin directly determines whether oil returns to the compressor or accumulates in the evaporator.

How Each VG68 POE Oil Compares

Qishanr QSL-68H —Matches RL68H Specs, Ships in 7 Days

Qishanr QSL-68H is a synthetic POE refrigeration oil manufactured by Qishanr Lubricants. It is formulated as a cross-reference replacement for Emkarate RL68H and CPI Solest 68 across all HFC and HFO compressor applications.

• Pour point of -45°C is the best in class. This ensures oil fluidity and reliable return from evaporators operating at -30°C to -40°C —a critical requirement for low-temperature rack systems and blast freezers.
• Viscosity at 40°C of 67.2 cSt is the highest of the three, delivering a marginally thicker bearing film under high-load screw compressor conditions.
• GB/T test standards are methodologically equivalent to ASTM and ISO. QSL-68H passes the same ISO VG68 specification window regardless of which national standard the lab uses.
• Tested per GB/T 265 (kinematic viscosity), GB/T 3535 (pour point), GB/T 3536 (flash point), GB/T 1884 (density), GB/T 1995 (viscosity index).

Emkarate RL68H —The Industry Reference Standard for VG68 POE

Emkarate RL68H, manufactured by Lubrizol, has been the factory-fill VG68 POE oil for compressor OEMs for over 30 years. When a maintenance manual specifies RL68H by name, it is referencing this product.

• Viscosity Index of 120 is the highest of the three. In systems with wide temperature swings —heat pumps, transport refrigeration —this provides the most stable bearing film across the operating range.
• Flash point of 270°C provides the largest thermal safety margin. This is relevant for high-compression-ratio systems where discharge temperatures approach 150°C.
• Pour point of -39°C works for medium-temperature applications (evaporator above -25°C). For low-temperature systems below -30°C, QSL-68H provides 6°C more operating margin.
• Supply chain: Distributed through Lubrizol-authorized channels with standard lead times of 2-4 weeks. Minimum order quantities typically start at 100+ liters for non-contract buyers.
• Product page: Emkarate RL68H POE Refrigeration Oil

CPI Solest 68 —The North American VG68 Standard

CPI Solest 68, manufactured by CPI Fluid Engineering (Lubrizol division), is the primary VG68 POE oil in North American commercial refrigeration markets. It shares the same POE chemistry family as RL68H but with a distinct ester formulation.

• Pour point of -43°C sits between QSL-68H (-45°C) and RL68H (-39°C).
• Viscosity at 100°C of 8.9 cSt is the lowest high-temperature viscosity. In screw compressors with discharge temperatures above 120°C, this produces a thinner bearing film than QSL-68H (9.2 cSt) or RL68H (9.4 cSt).
• Distribution outside North America is limited. Buyers in Asia, the Middle East, Africa, and Latin America face premium freight costs and unreliable availability from CPI's authorized channels.

What the Numbers Mean in Your Compressor

Pour Point Determines Oil Return at Low Temperature

Pour point is the lowest temperature at which oil flows under gravity. In a low-temperature refrigeration system, the oil-refrigerant mixture in the evaporator must remain fluid enough to travel through the suction line back to the compressor. If the oil gels, it stays in the evaporator —reducing heat transfer, starving the compressor, and causing bearing failure within months.

QSL-68H at -45°C delivers three concrete operational advantages over RL68H at -39°C:

• Reliable oil return in freezer rooms operating between -25°C and -35°C evaporator temperature
• Reduced oil logging during defrost cycles, when cold oil is most likely to stall in evaporator U-bends
• Margin of safety for systems with suction line accumulators, where oil must separate from liquid refrigerant before returning

Viscosity Index Matters in Variable-Temperature Systems

RL68H leads with VI 120, meaning its viscosity changes less as temperature fluctuates. In a heat pump cycling between -10°C evaporator and +65°C condenser, this stability matters. In a fixed-temperature cold storage system running steady-state at -25°C SST, the VI difference between 114 (QSL-68H) and 120 (RL68H) produces no measurable difference in bearing life. Select based on your operating profile, not the data sheet alone.

Flash Point Confirms Thermal Stability

All three oils have flash points above 250°C. Normal HFC compressor discharge temperatures run 80-130°C. Even under high-compression-ratio conditions approaching 150°C, all three oils maintain a 100°C+ safety margin. If discharge temperatures exceed 150°C, the root cause —low refrigerant charge, fouled condenser, or high suction superheat —must be corrected regardless of which oil is in the system.

Procurement Comparison: Price, Lead Time, and Flexibility

When technical specifications are within 2% of each other across all parameters, the procurement terms decide the supplier. This section compares the commercial factors that affect your order.

QSL-68H Packaging and Minimum Order Quantities

Qishanr ships QSL-68H in five packaging formats. Each format has a defined minimum order quantity based on production batch economics.

• 1L bottles: MOQ 3,000 units. Designed for aftermarket distribution, service fill kits, and retail shelf packaging.
• 5L containers: MOQ 300 units. The standard format for workshop and field service technicians.
• 10L containers: Available for medium-volume service operations that find 5L insufficient and 20L oversized.
• 20L pails: MOQ 100 units. The most common format for compressor oil changes and system charging in commercial HVAC.
• 200L drums: MOQ 20 units. Designed for OEM production lines, bulk storage, and high-volume service operations.

Emkarate RL68H through Lubrizol-authorized distributors carries minimums of approximately 100 liters for non-contract buyers. CPI Solest 68 availability outside North America depends on regional distributor stock, which introduces lead time uncertainty and premium freight cost.

Customization: Private Label, OEM Branding, and Modified Specifications

Qishanr offers three tiers of product customization for QSL-68H:

• Standard —7 days: Qishanr-branded QSL-68H in standard packaging. Ready to ship from production inventory.
• Light customization —15-20 days: Your label design on factory packaging, private-label branding, technical data sheets in your language, or modified container sizes within standard formats.
• Special customization —45+ days: Adjusted ester formulation, specific additive packages, non-standard packaging formats, or integrated logistics programs. Timeline varies with formulation complexity and required qualification testing.

This flexibility serves compressor OEMs who want their own branded lubricant line, HVAC service chains standardizing on a house brand, and refrigeration oil distributors entering new regional markets.

Compressor Brand Compatibility

QSL-68H has been validated as a cross-reference lubricant for the following compressor brands and their OEM oil specifications. Each entry maps QSL-68H to the equivalent OEM part number or specification.

This table covers all major compressor brands that specify ISO VG68 POE oil. For POE vs mineral oil selection guidance across different compressor types, see: POE Oil vs Mineral Oil: Which Refrigeration Lubricant Should You Choose?

Which VG68 POE Oil Should You Choose?

Select Qishanr QSL-68H when:

• You need delivery in 7 days, not 3 weeks
• Your system operates at low evaporator temperatures where the -45°C pour point prevents oil logging
• You require flexible order quantities —from a pallet of 20L pails to a container of 200L drums
• You want private label packaging with your company brand, delivered in 15-20 days
• Your market is Asia, Middle East, Africa, or Latin America, where Qishanr logistics from China provide competitive landed cost
• You are sourcing manufacturer-direct and eliminating distributor markup

Select Emkarate RL68H when:

• Your compressor OEM warranty terms explicitly name RL68H and permit no substitution
• Your system is a heat pump with wide temperature swings where the VI 120 advantage produces measurable bearing life improvement
• Your supply chain is fully integrated with Lubrizol distribution and switching costs exceed the procurement savings

Select CPI Solest 68 when:

• Your operations are entirely within North America where CPI distributor networks provide reliable availability
• Your OEM documentation specifies Solest 68 by name

Frequently Asked Questions

Is QSL-68H a direct replacement for Emkarate RL68H?

Yes. QSL-68H is formulated as a direct cross-reference replacement for Emkarate RL68H. Both are ISO VG68 polyol ester (POE) oils with kinematic viscosity at 40°C within 1 cSt of each other —67.2 cSt (QSL-68H) vs 66.6 cSt (RL68H). Both are within the ISO VG68 specification range of 61.2-74.8 cSt. QSL-68H pours at -45°C, which is 6°C lower than RL68H (-39°C). QSL-68H can be used as a complete system charge or as a service top-up in systems currently running RL68H. Both are fully miscible POE chemistries.

Can I mix QSL-68H with Emkarate RL68H in the same compressor?

Yes. QSL-68H and Emkarate RL68H share the same polyol ester base chemistry. Mixing them does not cause chemical reaction, additive precipitation, or loss of lubricity. This means QSL-68H works as both a complete oil charge for new installations and a top-up oil during service on existing RL68H-filled compressors. As with all POE oil handling, reseal containers immediately after pouring —POE oil absorbs atmospheric moisture.

What is the pour point of QSL-68H compared to RL68H?

QSL-68H has a pour point of -45°C, tested per GB/T 3535. Emkarate RL68H has a pour point of -39°C, tested per ASTM D97. CPI Solest 68 has a pour point of -43°C, tested per ASTM D97. The 6°C advantage of QSL-68H over RL68H means more reliable oil return from evaporators operating below -30°C in freezer and cold storage applications.

What compressors are compatible with QSL-68H?

QSL-68H is validated for use in screw, scroll, and reciprocating compressors from BITZER, Carrier, Trane, HANBELL, Hitachi, York (Johnson Controls), Copeland, Danfoss, and Fusheng. It cross-references to BITZER BSE55/BSE32, Carrier PP23BZ103005C, HANBELL HBR-B03/B05, York YORK V oil, and Fusheng FS120R through FS300R specifications. Always verify the specific viscosity grade requirement against your compressor nameplate before charging.

What is the lead time for QSL-68H compared to RL68H?

QSL-68H standard lead time is 7 days for Qishanr-branded packaging from production inventory. Emkarate RL68H and CPI Solest 68 through authorized distributors typically require 14-28 days. For private label or custom packaging, QSL-68H ships in 15-20 days. This 7-day standard lead time eliminates the most common procurement complaint about branded POE oils: waiting 3 weeks for a compressor oil change that the maintenance window cannot postpone.

Does using QSL-68H void my compressor warranty?

No. Under the Magnuson-Moss Warranty Act (US) and equivalent consumer protection laws in the EU, a manufacturer cannot void a compressor warranty solely because a non-OEM-branded lubricant was used, as long as the lubricant meets the OEM's published specifications. QSL-68H meets or exceeds ISO VG68 POE specifications and is formulated for HFC and HFO refrigerants. For installations under active OEM warranty, confirm the specific warranty terms with the compressor manufacturer before substituting lubricants. Document the oil change with the QSL-68H technical data sheet for your maintenance records.

What refrigerants does QSL-68H work with?

QSL-68H is compatible with all HFC refrigerants (R-134a, R-404A, R-407C, R-410A, R-507A), all HFO refrigerants (R-1234yf, R-1234ze), and HFC/HFO blends (R-448A, R-449A, R-452A, R-513A). It is also compatible with HCFC R-22 for retrofit preparation where the system is being converted from R-22 to an HFC alternative. QSL-68H is not suitable for ammonia (R-717) systems, CO₂ (R-744) transcritical systems, or hydrocarbon refrigerants (R-290 propane, R-600a isobutane). Those applications require mineral oil, PAO, or PAG lubricants respectively.

QSL-68H: Same Specification. Faster Delivery. Lower Cost.

Qishanr QSL-68H matches Emkarate RL68H and CPI Solest 68 on every critical VG68 POE specification, with a pour point advantage that matters in low-temperature operation. The procurement difference is where QSL-68H separates from the branded alternatives:

• 7-day standard delivery —not 14-28 days
• Manufacturer-direct pricing —no distributor markup
• Flexible order quantities —from 20 drums to 3,000 bottles
• Private label capability —your brand on the packaging in 15-20 days
• Global logistics —competitive freight to 100+ countries from China

Contact Qishanr for the QSL-68H technical data sheet, a sample for your lab evaluation, or a quotation for your procurement volume.