I typically run 6 qts because:
1) No damage so far and
2) What the heck do I do with that extra 1/2 quart left over.
(Not like I'm going to stow it it for 6 months and then use it in another fill...)
There may be problems that present themselves if one consistently drives cajones-to-the-wall, but I drive 80 miles every business day and have had no problems other than water pump at 98,000 miles, and that was most certainly NOT due to too much oil. (Rather, it was due to the cruddy design of the WP impeller, which is plastic.)
Drive On.
Rob
