This business represented 8.4% of our total revenues and 7.7% of our total gross profit in the nine months ended September 30, 2019.
Commercial Vehicle Distribution. We are the exclusive importer and distributor of Western Star heavy-duty trucks (a Daimler brand), MAN heavy and medium duty trucks and buses (a VW Group brand), and Dennis Eagle refuse collection vehicles, together with associated parts, across Australia, New Zealand and portions of the Pacific. This business, known as Penske Commercial Vehicles Australia (“PCV Australia”), distributes commercial vehicles and parts to a network of more than 70 dealership locations, including ten company-owned retail commercial vehicle dealerships. One of these company-owned dealerships was acquired in February 2019 in New Zealand.
We are also a leading distributor of diesel and gas engines and power systems, principally representing MTU, Detroit Diesel, Allison Transmission, MTU Onsite Energy, and Rolls Royce Power Systems. This business, known as Penske Power Systems (“PPS”), offers products across the on- and off-highway markets, including in the construction, mining, marine, and defense sectors, in Australia, New Zealand and portions of the Pacific and supports full parts and aftersales service through a network of branches, field locations and dealers across the region. The on-highway portion of this business complements our PCV Australia distribution business, including integrated operations at retail locations selling PCV brands.
These businesses represented 2.3% of our total revenues and 4.1% of our total gross profit in the nine months ended September 30, 2019.
Penske Truck Leasing. We hold a 28.9% ownership interest in Penske Truck Leasing Co., L.P. (“PTL”), a leading provider of transportation and supply chain services. PTL is capable of meeting customers’ needs across the supply chain with a broad product offering that includes full-service truck leasing, truck rental and contract maintenance, along with logistic services such as dedicated contract carriage, distribution center management, transportation management and lead logistics provider services and dry van truckload carrier services. Effective September 1, 2019, Penske Transportation Solutions (PTS) has become the new universal brand name for PTL’s various business lines, Penske Truck Leasing, Penske Logistics, Epes Transport Systems, Penske Vehicle Services, and related products and services to better articulate the breadth of its capabilities. PTL is owned 41.1% by Penske Corporation, 28.9% by us, and 30.0% by Mitsui & Co., Ltd. (“Mitsui”). We account for our investment in PTL under the equity method, and we therefore record our share of PTL’s earnings on our statements of income under the caption “Equity in earnings of affiliates,” which also includes the results of our other equity method investments. We recorded $106.0 million and $91.7 million in equity earnings from this investment for the nine months ended September 30, 2019 and 2018, respectively.
Outlook
Retail Automotive Dealership. For the nine months ended September 30, 2019, U.S. light vehicle sales decreased 1.6%, as compared to the same period last year, to 12.7 million units, with an increase of 2.7% in sales of trucks, crossovers and sport utility vehicles and a decrease of 11.0% in sales of passenger cars. We believe the sales of trucks, crossovers and sport utility vehicles will continue to outperform passenger car sales, largely due to consumer preference and OEM product offerings. We believe the U.S. market for new light vehicle sales remains strong, but has plateaued and may be impacted in future periods by several different factors including vehicle affordability, consumer confidence, the level of unemployment, the level of OEM incentives, increasing lease returns, interest rates, strong credit availability, the age of vehicles on the road, vehicle innovation, and tariffs, although actual sales may differ materially. We expect lease returns to provide customers in the used vehicle market with an ample supply of affordable late model, low mileage vehicles.
For the nine months ended September 30, 2019, U.K. new vehicle registrations decreased 2.5%, as compared to the same period last year, to 1.9 million registrations. We believe the year over year decline is significantly attributable to the economic and political uncertainty caused by the U.K.’s potential exit from the European Union (“Brexit”) which is scheduled to occur on January 31, 2020, though Brexit may occur earlier with a withdrawal agreement, or later. We believe Brexit is impacting, and may continue to impact, new and used sales as well as consumer confidence and the economic environment generally, and may lead to further declines in new and used vehicle sales in future periods. Since no country has previously left the European Union, the outcome of any future negotiations between the U.K. and the