2003 Chevrolet Impala - Oil Level Wacky

Oil change of 4.5 qts “some times” reads on the dipstick as much as 2 qts too much. This has happened a dozen times over the past two years whether I do it myself, or have it done by a mechanic.

Try this, remove the dipstick then wait 5-10 minutes for any residual oil in the dipstick tube to drain, then check the level.