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 six company-owned retail commercial vehicle dealerships.
We are also a leading distributor of diesel and gas engines and power systems, principally representing MTU, Detroit Diesel, Mercedes-Benz Industrial, Allison Transmission and MTU Onsite Energy. This business, known as Penske Power Systems (“PPS”), offers products across the on- and off-highway markets 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 existing PCV Australia distribution business.
These businesses represented 2.1% of our total revenues and 3.9% of our total gross profit in 2016.
Penske Truck Leasing. We currently hold a 23.4% ownership interest in Penske Truck Leasing Co., L.P. (“PTL”), a leading provider of transportation services and supply chain management. 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. On July 27, 2016, we acquired an additional 14.4% ownership interest in PTL from subsidiaries of GE Capital Global Holdings, LLC (collectively, “GE Capital”) for approximately $498.5 million in cash to bring our total ownership interest to 23.4%. Prior to this acquisition, we held a 9.0% ownership interest in PTL. PTL is currently owned 41.1% by Penske Corporation, 23.4% by us, 20.0% by affiliates of Mitsui & Co., Ltd. (“Mitsui”), and 15.5% by GE Capital. 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.
Please see the discussion provided under “Outlook” in Part I, Item 1 for a discussion of our outlook in our markets.
Automotive and commercial truck dealerships represent the majority of our results of operations. New and used vehicle revenues include sales to retail customers and to leasing companies providing consumer leasing. We generate finance and insurance revenues from sales of third-party extended service contracts, sales of third-party insurance policies, commissions relating to the sale of finance and lease contracts to third parties and the sales of certain other products. Service and parts revenues include fees paid by customers for repair, maintenance and collision services, and the sale of replacement parts and other aftermarket accessories as well as warranty repairs that are reimbursed directly by various OEMs.
Our gross profit tends to vary with the mix of revenues we derive from the sale of new vehicles, used vehicles, finance and insurance products, and service and parts transactions. Our gross profit varies across product lines, with vehicle sales usually resulting in lower gross profit margins and our other revenues resulting in higher gross profit margins. Factors such as inventory and vehicle availability, customer demand, consumer confidence, unemployment, general economic conditions, seasonality, weather, credit availability, fuel prices and manufacturers’ advertising and incentives also impact the mix of our revenues, and therefore influence our gross profit margin.
Aggregate revenue and gross profit increased $833.6 million, or 4.3%, and $99.1 million, or 3.5%, respectively, during 2016 compared to 2015. The increases are largely attributable to increases in new and used vehicle, finance and insurance, and service and parts revenue and gross profit from net dealership acquisitions.
Additionally, as exchange rates fluctuate, our revenue and results of operations as reported in U.S. Dollars fluctuate. For example, if the British Pound were to weaken against the U.S. Dollar, our U.K. results of operations would translate into less U.S. Dollar reported results. The British Pound weakened against the U.S. Dollar during 2016 compared to