We reported second quarter net income per unit of $1.22 this morning. Normalizing for mark-to-market commodity adjustments, which we generally exclude from our guidance, we generated net income per unit of $1.01, per unit. Our quarterly results significantly exceeded the $0.83 guidance we gave back in early May, due to 2 primary factors. First, transportation volumes were higher than expected, with gasoline shipments improving with lower gasoline pricing during the start of the higher-demand summer driving season. Crude oil volumes were also significantly higher, as shippers increased their utilization of our Houston-area distribution network.
The second factor contributing to our improved performance in the quarter was an increase in product sales from our commodity activities. Our quarterly distributable cash flow increased to a record $134 million, resulting in a 1.3x coverage ratio for both the quarter and year-to-date, even with our latest quarterly distribution payout of $0.945 per unit. I know a number of you were pleasantly surprised with the significant increase to our distribution that was announced last week, and I think these very strong coverage ratios clearly demonstrate why our management team believe now is the time for a step change, in Magellan's distribution, to provide additional value back to our investors. Even though we had a strong second quarter, this was not the only reason for the decision to raise the distribution beyond guidance.
At the end of the first quarter, our DCF guidance was $490 million, which would have resulted in excess DCF of approximately $100 million for 2012, assuming a 9% distribution growth for the year. As you recall, we have indicated that we believe around $75 million of excess cash is prudent, based on the current market environment. So our DCF projections for 2012 were already in excess of what we felt was necessary. However, as you may also recall, there were a number of items still being worked out, when we first advertised the 9% distribution growth target for 2012 earlier this year.