Quote:
Originally Posted by John 070
Yeah, oil doesn't matter.
However, what's interesting is that the GM direct injection does not require the maintenance as does the BMW and Audis. I saw someone once post a technical article about the GM motor (as in the Camaro and CTS 6 cyl.)....
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I don't know anythying about GM's motors, but they may have an auxiliary port injector to wash the valves.