| Moyle | R. E. | 29 Cavendish Street, Highgate Hill | Rugby | 8562 | Metro Private Car | 1925-26 |
| Moyle | R. E. | 29 Cavendish Street, Highgate Hill | Rugby | 8562 | Metro Private Car | 1926-27 |
| Moyle | R. E. | 29 Cavendish Street, Highgate Hill | Rugby | 8562 | Metro Private Car | 1927-28 |
| Moyle | R. F. | 29 Cavendish Street, Highgate Hill | Rugby | 1009 | Metro Private Car | 1927-28 |
| Moyle | V. A. | 135 Wellington Street, Perth | Dodge | 3327 | Metropolitan Hire and Trade Cars | 1923-24 |
| Moyle | W. A. | Narrogin | Ford | NA ● 35 | Narrogin Road Board | 1924-25 |
| Moyle | W. A. | Narrogin | Ford | NO ● 35 | Narrogin Road Board | 1925-26 |
| Moyle & Peterson | - | Ottey Place, Perth | Dodge | 4729 | Metro Private Car | 1924-25 |
| Moyle & Peterson | - | Hay Street, Perthottey Place Perth | Dodge | 4729 | Metro Private Car | 1925-26 |
| Moyle and Peterson | - | Ottey Place, Perth | Dodge | 4729 | Metro Private Car | 1923-24 |
| Moyses | A. | Popanyinning | Ford | CN ● 29 | Cuballing Road Board | 1925-26 |
| Moyses | A. | Popanyinning | Ford | CN ● 29 | Cuballing Road Board | 1926-27 |
| Moyses | A. | Popanyinning | Ford | CN ● 29 | Cuballing Road Board | 1927-28 |
| Moyses | G. M. | Highbury | Ford | NA ● 27 | Narrogin Road Board | 1924-25 |
| Moyses | G. M. | Highbury | Ford | NO ● 27 | Narrogin Road Board | 1925-26 |
| Moyses | G. M. | Highbury East | Ford | NO ● 27 | Narrogin Road Board | 1926-27 |
| Moyses | G. M. | Highbury | Ford | NO ● 27 | Narrogin Road Board | 1927-28 |
| Moyses | J. W. | Collie | Overland | CO ● 110 | Collie Road Board | 1927-28 |
| Moysey | B. | Lake Grace | Ford Truck | LG ● 45 | Lake Grace Road Board | 1926-27 |
| Moysey | B. | Lake Grace | Ford Truck | LG ● 45 | Lake Grace Road Board | 1927-28 |
| Mozzoletti | P. | Bridgetown | Chevrolet Truck | B ● 17 | Bridgetown Road Board | 1927-28 |
| Mrs Maud | James | Three Springs | Dodge | MI ● 8 | Mingenew Road Board | 1923-24 |
| Mrs Thomas & Sons | - | Ravenswood | Ford | MY ● 22 | Murray Road Board | 1922-23 |
| Mt Augustus Pastoral Co | - | Mount Augustus Station | Dodge | GU ● 40 | Upper Gascoyne Road Board | 1926-27 |
| Mt Lyall Chemical Works | - | North Fremantle | Ford Truck | 7139 | Metro Private Car | 1925-26 |
| Mt Marshall Road Board | - | Bencubbin | Overland | MM 45 | Mount Marshall Road Board | 1924-25 |
| Mt Marshall Road Board | - | Bencubbin | International Truck | MM ● 63 | Mount Marshall Road Board | 1926-27 |
| Mt. Lyall Chemical Works | - | North Fremantle | Ford Truck | 7139 | Metro Private Car | 1926-27 |
| Mt. Lyell Chemical Works | - | Rocky Bay Fremantle | Ford | 6007 | Metro Private Car | 1924-25 |
| Mt. Lyell Chemical Works | - | North Fremantle | Ford | 2764 | Metro Private Car | 1924-25 |
| Mt. Lyell Chemical Works | - | North Fremantle | Ford | 2764 | Metro Private Car | 1925-26 |
| Mt. Lyell Chemical Works | - | North Fremantle | Ford | 2764 | Metro Private Car | 1926-27 |
| Mt. Lyell Chemical Works | - | North Fremantle | Ford | 2764 | Metro Private Car | 1927-28 |
| Mt. Lyell Farmers Fertilliser Co | - | North Fremantle | Ford Wagon | 12687 | Metro Private Car | 1927-28 |
| Mt. Margaret Road Board | - | - | Ford Truck | MG ● 10 | Mount Margaret Road Board | 1926-27 |
| Mt. Margaret Road Board | - | - | Ford Truck | MG ● 34 | Mount Margaret Road Board | 1927-28 |
| Mt. Rupert Co | - | Wongan Hills | Chevrolet Truck | WB ● 160 | Wongan-Ballidu Road Board | 1926-27 |
| Mt. Rupert Co | - | Wongan Hills | Dodge Truck | WB ● 161 | Wongan-Ballidu Road Board | 1926-27 |
| Mt. Rupert Co | - | Wongan Hills | Chevrolet Truck | WB ● 160 | Wongan-Ballidu Road Board | 1927-28 |
| Mt. Rupert Co | - | Wongan Hills | Dodge Truck | WB ● 161 | Wongan-Ballidu Road Board | 1927-28 |
| Mt. Weld Pastoral Co Ltd | - | - | Ford | MG ● 6 | Mount Margaret Road Board | 1927-28 |
| Mt. Weld Pastoral Co Ltd | - | - | Ford Truck | MG ● 7 | Mount Margaret Road Board | 1927-28 |
| Muccan Pastoral Co | - | - | Austin | MB ● 3 | Marble Bar Road Board | 1927-28 |
| Muccan Pastoral Co | - | - | Federal-Knight Truck | MB ● 28 | Marble Bar Road Board | 1927-28 |
| Muck | Mrs C. | Gingin | Dodge | GG ● 1 | Gingin Road Board | 1925-26 |
| Muclloch | W. | 19 Victoria Street | Jewett Hire Car | K ● 1 | Kalgoorlie Road Board | 1926-27 |
| Mudge | A. L. | Wagin | Gray | WN 40 | Wagin Municipality | 1925-26 |
| Mudge | A. L. | - | Gray | W ● 146 | Wagin Road Board | 1926-27 |
| Mudge | A. L. | - | Gray | W ● 146 | Wagin Road Board | 1927-28 |
| Mudge | E. C. | 10 Chester Street, Subiaco | Oldsmobile | 11136 | Metro Private Car | 1926-27 |
