Your engine is ready for a high quality
synthetic, no need to wait further. Use Mobil 1
oil & a Mobil 1 Filter. You will have all the friction reduction of the so called pure synthetics without the extra expense.
Do you know if you have chrome-moly
oil pump driveshaft. If so, there is no danger in using a heavier
synthetic oil like Mobil 1 15w-50. I've been using it for 9 years & 34,000 miles in my small block without any issues. No measurable wear or leaks. And you won't need an additive with it either. If you use a lighter weight oil, you might want to consider a
zinc additive.
If you have roller camshaft, then a
zinc additive is not necessary. If you have a flat tappet cam, you will need a zddp additive. The best zddp additive available is:
http://www.cam-shield.com/
No conventional oil can reduce wear like
synthetic oil. Don't believe otherwise.
you wanted opinions. based on experience, that's mine.
Z.