This is my second run of Schaeffers 10w-30. Car had 48,300 miles on it at this test. This has the 3800 series V6.
Schaeffers Supreme, 10w-30
1st column oil had 7,100 miles, 48,300 miles
2nd column oil had 7,000 miles, 40,700 miles
MOBIL 1 10w-30, NEXT 2 COLUMNS
3rd column oil had 6,700 miles...