Valvoline Synpower Oil Change Interval

[gork57]

I'm considering going to Valvoline Synpower for my next oil change at Brakes Plus. I went to the Valvoline website, and they suggest using the normal oil change interval recommended by the manufacturer. In the case of my '92 Civic VX, I believe that's 5000 miles (of course oil change shops always recommend 3000)-have to check my manual on that. What's the real deal here?

I posted something awhile back (or maybe just read someone else's thread on it), and I recall the consensus was about 5k. A "normal" oil change costs $21.99, synthetic is $51.99; I'm not so sure the cost-benefit evaluation works so well for this at more than double the cost.

Facts, opinions, and experiences with Synpower would be appreciated.