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I'm concerned about the new oil my GM dealer is using, I have a late model GM truck with free oil changes, and noticed my dealer using a new oil brand called Duramax 5W30 dexos1. The service manager didn't seem to know much about it, plus wasn't too happy about the switching from the much higher...

Looks like these guys will be the next Exxon/Mobil, Castrol/BP http://www.shell.com/global/products-ser...-lube-park.html

Does anyone know if there's any difference between original formulators and rebranded for the Dexron6 regarding quality or price? http://www.gmpowertrain.com/VehicleEngines/DEXRON-VI.aspx

I currently use the blue color lithium complex nlgi2, and saw this topic on anther forum, got me thinking. Mobil uses kg, while Sinopec uses N their four ball test. How do you do the comparison? Mobil XHP 222 4-Ball Wear Test, ASTM D 2266, scar, mm (0.5)...

Does anyone buy any of their lubricating oils and greases online? Currently use a local distributor for everything including those small orders with payment terms of 30 days, but been finding super low prices online, with up to 60 days credit terms. For example, the Sinopec lithium multipurpose...