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What is the difference between GL4 and GL5? - What does GL mean in oil?

Different transmissions or axles require different transmission oils. Therefore, the transmission oils are labeled with specifications from vehicle manufacturers and the American Petroleum Institute (API) so that the right oil can be found for the transmission or axles.

The GL standards are very well known in the transmission oils. GL stands for nothing other than "Gear Lubricant" and belong to the API transmission oil specifications. Today, there are the following API GL specifications:


API GL-4


API GL-4
lubricants are suitable for axles with helical gears that operate under moderate to heavy speed and load conditions or for axles with hypoid gears that run under moderate speed and load conditions. API GL-4 oils are also used in selected manual transmissions (without hypoid gears) and transaxle applications for which API MT-1 lubricants are not suitable.



API GL-5

API GL-5 lubricants are suitable for transmissions (especially hypoid transmissions) and for axles that are operated under various combinations of high-speed/impact loads and low-speed/high-torque conditions.
A GL-5 transmission oil is also required for limited-slip differential, but with additional LS additive (LS = Limited Slip). This can be added separately or you can take directly an oil that is specifically formulated and already includes LS additive. The following Midland oils already include LS additive and are therefore suitable for limited slip differentials:

In summary, lubricants with the API GL-4 specification are suitable for lubricating axles as well as synchronized and non-synchronized transmissions. Lubricants with the API GL-5 specification are specifically suitable for hypoid transmissions and heavily loaded axles. However, there are also products that have both of these properties and thus meet API GL-4 and API GL-5.These products can be used in both manual transmissions and axles, for example.

With our standard search, you can find all Midland products that meet either GL-4 or GL-5 in just a few clicks.

Find out now what transmission oil your vehicle needs. Thanks to our Oil Finder, you can easily search for your vehicle and receive all the matching Midland products as a result.

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Oil-Finder

Find the right Midland transmission fluid for your vehicle now.

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Stay in Motion Smoothly - Lubricants from Midland

With Midland's lubricants, everything runs smoothly! Whether for passenger cars, trucks & buses, motorcycles & ATVs, marine, construction machines, industry, agriculture & forestry or classic cars - we offer you the full range of quality lubricants for all areas of application. This includes engine oils, transmission oils, hydraulic oils, additives, coolant protection and supplementary products. Since 2017, we have had the most modern fully automated lubricant production plant in Switzerland to constantly provide you with consistent and constantly carefully controlled quality. That's what our company slogan "Swiss Quality Oil" stands for.

 

Midland: A Brand of the Swiss Traditional Company Oel-Brack AG

The Midland brand was launched by Oel-Brack AG in 2004, which has been producing and importing products of American oil companies under license as a family business since 1880. Under the Midland brand, the Swiss family business trades in heating oil and fuels domestically and produces quality lubricants for domestic and foreign markets in Aargau (Hunzenschwil). In Switzerland alone, Midland lubricants are delivered to over 3000 passenger car and truck garages, motorcycle dealers, workshops, yards, forest offices and industrial companies, while almost half of the total production is exported.

 

Find the right lubricant with just a few clicks - Midland's Oil Finder

What engine oil should I use for my classic car? What hydraulic oil is best suited for my motorcycle? What should I look for when buying additives? Finding the right lubricants is not easy due to the large selection of different products. But now that's a thing of the past. Midland provides you with a convenient online Oil Finder, with which you can now reach the right lubricant with just a few clicks. Simply select the vehicle or machine and browse through the individually compiled product selection. You will receive product recommendations for each application area, including important interval hints for changing. Try it now!

 

Buy lubricants at Midland and get good advice

Midland offers quality lubricants and provides expert advice. If you have any questions about their products or would like to purchase motor oil, their specialists are available to assist you via phone +41 62 889 10 30, email info@oelbrack.ch, or their contact form. They are dedicated to providing personalized advice and are happy to answer your questions with their years of experience in the field of lubricants and fats.
Contact Midland for expert advice and support.

Midland is an internationally active private label of the company Oel-Brack AG. The family business specializes in the production of high-quality lubricants, which are sold both in Switzerland and internationally under the brand Midland – Swiss Quality Oil. Additionally, the company deals in heating oil and fuels in German-speaking Switzerland, where there are also various Midland gas stations.

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There are a large number of different additives which are used in lubricants. In general, they are intended to fulfill the following tasks:

  • Protect surfaces from wear and corrosion
  • Protect against oil aging
  • Improve oil properties

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Every engine is different, which is why there are different types of engine oils. To ensure that the engine is always optimally lubricated, the oil changes should also be carried out according to the manufacturer's specifications. With the right oil and the right change intervals, the lifespan of an engine can thus be extended. However, with the large number of engine oils that are now available, it is not always easy to keep track. We can help you find the right engine oil.

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