Here's a happy coincidence; Advance Auto Parts has a buy one get one free deal on some of their oils. I'll be picking up 30 quarts of Mobil Super Synthetic 5W-30 this week for about $3.50 a quart; that'll cover two changes for both my X5 and my daughter's 318Ti.

__________________
2001 X5 Sport 3.0/5-speed
1998 318ti/5-speed
1988 735i/5-speed
1984 528e/5-speed (soon to be M20B25-powered 525i!)