I wouldn't buy the "cheap" WALLY WORLD brand but use a name brand quality oil.
A far as clutch slippage, look on the back of the container for the circular seal about the oil.....if it says "Energy Conserving" it "can" cause clutch slippage. Stick with the oils that DON'T say "Energy Conserving".
Todays oils are very good quality and as long as you change it on a regular basis you're fine. If I run regular dino oil I change it every 3,000 if I rum Mobil 1 Synthetic I change it every 5,000/6,000. I try and run full synthetic in the HOT Summer months.
IMOP, you don't need to use motorcycle specific oils that cost twice as much as car oils either. I have a riding buddy that lives in San Diego and has been using regular dino CASTROL GTX 10/40 car oil in his bikes for years. He rides HARD and he's had 3 engines go over 100,000 miles with NO engine issues with the CASTROL.
He DOES change it every 3,000 religiously!
Just my opinion....I'm sure you'll have others to read.
Current Ride...2008 Yamaha FJR1300
2007 Suzuki Bandit1250
2006 Triumph Sprint
2004 Kawasaki ZRX1200
2002 Kawasaki ZRX1200
1996 Kawasaki Vulcan 750
1984 Honda V65 Sabre 1100
1986 Kawasaki Vulcan 750
1982 Suzuki GS750EZ
1974 Suzuki GT380
Last edited by SoCalVulcan; 11-12-2010 at 01:04 PM.