Where to get more synthetic oil for your buck??

["Levy Ring" <levy@xxxxxxxxxxxxxx>]

Well its that time again for an oil change; before I go out and cash out 
for some more Valvoline synthetic 20W-50 oil for my GTV6, does anyone know a 
place where I can get some quality synthetic oil cheaper than what the local 
Kragen sells it for, or maybe even in bulk to save some money?
The PO and I have used Redline in the past, but that is more than I want to 
spend right now. I have not been able to find any other fully synthetic 
brand of 20w-50 motor oil on the store shelves, other than Redline and 
Valvoline. Chevron and Mobil produce 15w-50 synthetic oil, would those be 
safe to use on my engine with 140K on it? Any recommendations?
Thanks, 
Levy
San Jose, CA
84 GTV-6
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