I emailed Warren Performance Packaging today (maker of Supertech) to get the specs on their conventional 5W20, 5W30, 15W40, and Dexos 5W20 and Dexos 5W30 syn. All of the oils meet major specs, (Chrysler, GM, Ford) and a few of the specs are approved, most of the specs, such as chrysler ms6395, gm 6094m, and ford wss-m2c945-a, all say "meets requirements". So would I be crazy to start using supertech exclusively in my vehicles and families vehicles I take care of? I think it would be great for my Ranger, great price and meets the required specs. I'm sticking to Delvac in my Cummins though, been using it since its new with no problems. Whats your opinions guys?
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