I went to Wal-Mart...

and I thought, what the heck, lets change me some oil...

last change was at Jiffy Lube at 99406 miles in October, so 7,000 miles later I think it was a time to change it again... the JF was too much at $37.99, and the WM sounded right at $21.14

Well... I would need to factor into the cost the price of the OE filter at $16.12... and 8 liters (actually, 8.1L) of 5W40 fully synthetic Liqui-Moly (I know engine takes 8.5 liters/9 quarts, but I deliberately provide the mechanics with a bit less oil to stay on the safe side, and then top off in a day or two after driving) at $145 for 20 liters... so 8 liters cost me about $55-60...

total
$21.14
$16.12
$56.00
--------
$93.36