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The engine company. DEUTZ®

DEUTZ Quality Class

The benchmark of quality.

Lube Oils according to DQC Classification (DEUTZ Quality Class)

The introduction of the new ACEA and API oil specifications, as well as the requirements for longer oil change intervals, reduced oil refill quantities and the inclusion of alternative fuels in the DEUTZ engine portfolio means that the current oil release classes must be updated.

Quality Class Oil type
DQC I-02 Minimum oil quality, some shorter oil change intervals
DQC II-18 Engine oil, usually used in engines with open crankcase ventilation
DQC III-18 Standard quality, high performance diesel engine oils, for use in engines with closed crankcase ventilation and/or with high thermal loads
DQC IV-18 Ultra high performance diesel engine oils for engines with the highest levels of output, with closed crankcase ventilation and/or with the highest thermal loads and the highest requirements for piston cleanliness (suitable for TTCD steel piston engines)
DQC II-18 LA Low-ash engine oil, usually used in engines with open crankcase ventilation
DQC III-18 LA Low-ash high performance diesel engine oil, standard quality, for use in engines with closed crankcase ventilation and/or with high thermal loads
DQC IV-18 LA Low-ash ultra high performance diesel and gas engine oil for engines with the highest levels of output, with closed crankcase ventilation and/or with the highest thermal loads and very high requirements for piston cleanliness (suitable for TTCD steel piston engines) and extended oil change intervals

Applications for DQC Releases

The links on this page provide the lube oil producers with the opportunity to download the DEUTZ AG company standard for DQC releases together with the appendices (limit values and application forms). In the company standard, the formalities of the release procedure are also described.

Please Note

DEUTZ is the sole owner of the trademark DQC that is protected for all countries of the European Union Office for Harmonization in the Internal Market at the official file number 012454112. Furthermore, trademarks are protected in the USA, Canada and in China. All rights and claims in respect of the brand remain with DEUTZ DQC. 

DQC X-18 (LA) release sytem

Technical Circular Lubricants

Tables oil change intervals older engine series
Company Standard H 0685-3 (May 2018)­­
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Fees for Release Issue valid from 01.06.2018
DQC Release List Issue 09/2019
DQC Release List Issue for TTCD engines 09/2019

DQC X-10 (LA) release sytem

Appendix A
Appendix B
Appendix C
Fees for Release Issue valid until 01.06.2018