Writing to excel via Excel Interop

I pull data from a .CSV file that I dump into a multi-dim array.
I reformat array (into the final array) and then create an excel file and set all the column/row formatting.
In the final process, I dump parts of the array into structures columns.
I am using using Excel = Microsoft.Office.Interop.Excel;

The interaction with Excel seems to take longer than it should.

Using Interop to communicate with excel the most efficient/fastest way?

    int j = 2;
    oSheet.Range["A7:P" + rplUpdatedData.GetLength(0)].Borders.LineStyle = XlLineStyle.xlContinuous;
    for (int i = 7; i < rplUpdatedData.GetLength(0); i++)//i for Column index.
    {  

	oSheet.Cells[i, 1].value = rplUpdatedData[j, 0];
	oSheet.Cells[i, 2].value = rplUpdatedData[j, 3];
	oSheet.Cells[i, 3].value = rplUpdatedData[j, 4];
	oSheet.Cells[i, 4].value = rplUpdatedData[j, 15];
	oSheet.Cells[i, 5].value = rplUpdatedData[j, 24];
	oSheet.Cells[i, 6].value = rplUpdatedData[j, 6];
	oSheet.Cells[i, 7].value = rplUpdatedData[j, 26];
	oSheet.Cells[i, 8].value = rplUpdatedData[j, 8]; 
	oSheet.Cells[i, 9].value = rplUpdatedData[j, 28];
	oSheet.Cells[i, 10].value = rplUpdatedData[j, 30];
	oSheet.Cells[i, 11].value = rplUpdatedData[j, 12];
	oSheet.Cells[i, 13].value = rplUpdatedData[j, 26];
	oSheet.Cells[i, 14].value = rplUpdatedData[j, 16];
	oSheet.Cells[i, 15].value = rplUpdatedData[j, 1];
	oSheet.Cells[i, 16].value = rplUpdatedData[j, 2];

	j++;
    }

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Thanks
Jed-