Samuel Mitchell
Analyst · Morgan Stanley
Thanks, Jason, and good morning, everyone. Valvoline's first quarter has given us a great start to fiscal 2017, our first full year as a public company. We grew adjusted earnings per share at 9% over the prior year quarter and EBITDA from operating segments grew 8%.
We are making good progress on delivering against our 4 core priorities for the year. Our first priority is to drive business results in each segment, growing our market share and unit margins. Valvoline grew volume 7%, outpacing the market growth rate, with each segment delivering year-over-year gains. Valvoline Instant Oil Change registered a system-wide same-store sales increase of 9%.
Unit margins improved sequentially from Q4 as we passed through base oil increase -- cost increases that we saw toward the end of fiscal 2016. As you may have seen recently, posted base oil prices have increased modestly. I continue to remain confident in our ability to pass through cost increases in order to maintain unit margins and, over time, increase unit margins as we improve our premium mix.
Our second priority is to grow our retail Quick Lube business, both organically and inorganically. In the first quarter, we added 8 stores to our Valvoline Instant Oil Change network. Compared to the end of Q1 last year, we've added 120 stores to our system, including the acquisition of 89 Oil Can Henry's stores in February 2016. We recently announced signing a definitive agreement for the purchase of Time-It Lube, which will add another 28 company-owned stores to the network in Q2.
I'll provide a little more detail on this acquisition in a moment.
We are on track to add new company-owned stores in 2018, and we continue to work with our franchisees on their store development. Overall, the team continues to deliver on our customer promise of quick, easy, trusted in every store, every day.
Our third priority is to invest in digital marketing and infrastructure. These investments will enable us to directly engage with the consumer and to strengthen the relationship we have with our installer customers around the world while enhancing operational efficiency. We continue to make good progress on these investments. Most notably, we expect to launch our new CRM tool and customer portal during the second half of fiscal 2017, both of which should begin the process of simplifying our interface with customers and improving customer service levels. This is an important step in our digital transformation that will allow us to drive sales growth by reaching a broader base of customers, providing them with greater access to our full suite of marketing and training tools while leveraging our broader product portfolio.
Our fourth priority is to drive a culture of creating value for our shareholders. We believe this means consistently growing volume and profitability in the business. We also believe this means reinvesting into high-return projects and finding ways to return capital to shareholders. We've demonstrated all of these through our strong first quarter result, the announcement of the Time-It Lube acquisition and the initiation of a cash dividend.
As I mentioned earlier and as you'll see on this slide, we announced our plan to acquire Time-It Lube in early January -- I'm sorry, I'm going to back up to Slide 6, and we'll focus on the operating segments. As you can see on Slide 6, each of the 3 operating segments delivered solid year-over-year volume growth, with Quick Lube and International showing growth in EBITDA as well.
In Core North America, we had nice volume gains and continued to grow our premium mix. The EBITDA decline in Core North America was largely the result of modestly lower unit margins versus prior year. The first half of fiscal 2016 benefited from a positive price-cost lag effect as a result of declining raw material costs. As we indicated on our Q4 earnings call, we implemented price increases across all channels during the first quarter of this year in order to offset the base oil cost increases announced in the latter half of fiscal 2016.
In Quick Lubes, our store and franchise teams delivered strong same-store sales growth of 9% due to effective marketing, driving both customer retention and acquisition. To a lesser extent, favorable weather, particularly in December, combined with an extra sales day in the current quarter versus prior year, also contributed to the strong result. EBITDA increased $7 million or 26% as a result of strong operating performance as well as good results from the former Oil Can Henry's stores.
All right. Turning back to the Time-It quick lube acquisition. This acquisition, again, announced in early January, helps us accelerate the growth of our retail model, giving us 28 company-owned stores in East Texas and Louisiana. Like the Oil Can Henry's acquisition, this expands our reach in the markets where we previously had little presence, establishing a beachhead for further unit growth. Also, like Oil Can Henry's, Time-It Lube is well run, with a strong commitment to customer service and efficient operations. We're excited to have Time-It Lube joining Valvoline and look forward to closing that transaction later this quarter.
Finally, our International segment. Our International segment delivered solid volume gains. Coming off the heels of a softer quarter in Q4, we're now back in line with our longer-term volume growth expectation of high single digits. These volume gains were broad-based with both mature markets and emerging markets delivering solid growth, which was primarily driven by continued market penetration.
And with that, I'll turn it over to Mary for a detailed look at our first quarter results.