Resource conserving is what you DONT want the bottle of oil to say. There have been many of threads/discussions on this subject. Resource conserving eludes to the fact that Pennzoil has placed MOLY or other high count anti-friction agents in the oil.
the anti friction is supposed to give cars better gas mileage. Therefore being "resource conserving."
Sorry to say, but you need a different oil. Like ASAP. If your local store is out of the rotella synthetic, consider Mobil One 10-40w synthetic. Its an AWESOME oil....and is about $22 at walmart for 5qt bottle.
That resource conserving oil is DEFINITELY your problem. Consider a "car filter" oil filter too. I use a Purolater on mine.
Here's an oil filter cross reference guide....
Valks will use any filter in category "5"
http://motorcycleinfo.calsci.com/FilterXRef.html
-cheers, sorry