Quote Originally Posted by JMSBND View Post
I just dumped my oil after 5000km and a track day. Car has 60,000km and I run Honda 10w30 and it was still pretty nice. Doesn't use too much even after a full day tracking at Sandown. I think it's good value and since I change every 5000km not to bad at all. I run it in my CRX ZC race car too and will probably run it in my vintage air cooled stuff this summer as well.

I have never had an issue with factory oil in 12 years of Honda ownership.
10w30 is heavier than 5w30 (from Castrol).