i havent changed the oil in the 10 yet, maybe cause it has 26 miles on it (drove it home from the dear and its been sitting for 2 months now)
however i did change to rotella t on my 03 cobra at 6k miles. while i agree running ur engine hard to seat the ring is a good thing, (i had my cobra at the drag strip the second night i had it). i know for a fact the rings dont fully seat till about 5k miles, i did a compression test on my motor at 3k when i changed the oil and got 165-175 which was about average for 03 cobras but some were reporting alittle higher so i put dyno oil back in and drove it for 3 k more, same thing at 6 k miles and my compression was 178-185 for all 8 cyl, which is on the high side for my car and very good, i then switched to synthetic and wont be looking back.
so theres alittle proof that ur rings arent done "breaking in" right away. we all know rings require " a little" friction to break in, and i think its better safe than sorry, u can always change ur dyno oil more often if your worried about it.
Last edited by projekZERO; 11-14-2004 at 09:17 PM.