Brisbane, Queensland, AU -- (May 20, 2025) - Graphene...

Brisbane, Queensland, AU -- (May 20, 2025) - Graphene Manufacturing Group Ltd (TSXV: GMG) (OTCQX: GMGMF) is pleased to announce the launch of website www.g-lubricant.com to facilitate direct sale of its energy-saving graphene liquid concentrate G® Lubricant, which enhances the performance of diesel and gasoline (petrol) engines. The launch is with a new animation video promoting the ease and benefits of G-Lubricant (Figure 1):

Figure 1: www.G-Lubricant.com launch animation video
https://youtu.be/29DnDDDLK4I

Unleashing the Power of Graphene

G® Lubricant is a graphene liquid concentrate that can be added to any mineral or synthetic oil used in an internal combustion engine. The amount of graphene in the final lubricant once G® Lubricant is added in is only ~ 1:10,000, with the balance of the concentrate consisting of lubricating base oil. As a result, G® Lubricant can be used safely in any internal combustion engine. Over the past four years, GMG has conducted environmentally controlled testing of G® Lubricant in internal combustion engines monitored and verified by The University of Queensland. In those tests, G® Lubricant has been shown to increase fuel efficiency by up to 8.4% in those diesel engines tested. GMG's test results have been corroborated by similar savings realized by customers over a number of years of field testing in diesel and gasoline/petrol engines.

G® Lubricant is currently sold by GMG in different pack sizes on the direct marketing website including a 500 ml litre pack and 8 x 50 ml packs, which can be used to dose 50 litres of engine oil and 8 x 5 liters of engine oil, respectively, to provide improved engine performance. GMG intends to direct market the product to its targeted markets through various pack sizes for direct and bulk use to create awareness of the product and its benefits.

In addition, the Company is discussing global sales with potential distributors in different geographic areas and different original equipment manufacturers.

Further G® Lubricant Performance Tests

GMG carried out further G® Lubricant testing in mid May 2025 - this time in its Company van which was recently professionally serviced - a Mercedes Vito on a third party dyno testing facility with diesel engine exhaust emissions testing.

The performance testing showed demonstrated that the diesel engine van running at approximately 2500 rpm, 100 km/hr with approximately 400 Nm torque, the G® Lubricant provided approximately 13% of fuel savings (Figure 2) and a reduction of harmful NOx exhaust emissions of 27% (Figure 3) compared to testing under similar conditions without the use of any G® Lubricant.

A second dose of G® Lubricant was added to achieve these results due to the age and condition of the engine which has over 360,000 km of use - hence the total amount of graphene per engine oil was 0.02% (2 in 10,000) by weight - there was a total of 160 ml (2 x 80 ml) of G Lubricant added to the 8 litres of engine oil.

Figure 2: Fuel Efficiency Performance Increase from G-Lubricant

Figure 3: NOx Emissions Performance Increase from G-Lubricant

About GMG:

GMG is an Australian based clean-technology company which develops, makes and sells energy saving and energy storage solutions, enabled by graphene manufactured via in house production process. GMG uses its own proprietary production process to decompose natural gas (i.e. methane) into its natural elements, carbon (as graphene), hydrogen and some residual hydrocarbon gases. This process produces high quality, low cost, scalable, 'tuneable' and low/no contaminant graphene suitable for use in clean-technology and other applications.

The Company's present focus is to de-risk and develop commercial scale-up capabilities, and secure market applications. In the energy savings segment, GMG has initially focused on graphene enhanced heating, ventilation and air conditioning ("HVAC-R") coating (or energy-saving coating) which is now being marketed into other applications including electronic heat sinks, industrial process plants and data centres. Another product GMG has developed is the graphene lubricant additive focused on saving liquid fuels initially for diesel engines.

In the energy storage segment, GMG and the University of Queensland are working collaboratively with financial support from the Australian Government to progress R&D and commercialization of graphene aluminium-ion batteries ("G+AI Batteries"). GMG has also developed a graphene additive slurry that is aimed to improve the performance of lithium-ion batteries.

GMG's 4 critical business objectives are:

1. Produce Graphene and improve/scale cell production processes
2. Build Revenue from Energy Savings Products
3. Develop Next-Generation Battery
4. Develop Supply Chain, Partners & Project Execution Capability

For further information, please contact:

• Craig Nicol, Chief Executive Officer & Managing Director of the Company, [email protected], +61 415 445 223
• Leo Karabelas at Focus Communications Investor Relations, [email protected], +1 647 689 6041

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this news release.

Cautionary Note Regarding Forward-Looking Statements

This news release includes certain statements and information that may constitute forward-looking information within the meaning of applicable Canadian securities laws. Forward-looking statements relate to future events or future performance and reflect the expectations or beliefs of management of the Company regarding future events. Generally, forward-looking statements and information can be identified by the use of forward-looking terminology such as "intends", "expects" or "anticipates", or variations of such words and phrases or statements that certain actions, events or results "may", "could", "should", "would" or will "potentially" or "likely" occur. This information and these statements, referred to herein as "forward‐looking statements", are not historical facts, are made as of the date of this news release and include without limitation, the ability of G® Lubricant to enhance the performance of diesel and gasoline engines, the amount of G® Lubricant necessary to achieve performance improvements, the safety of G® Lubricant and GMG's intentions to direct market and use new distributors for global sales of G® Lubricant.