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How do you know that GM didn’t design the engine to burn a minuscule amount of oil for lubrication? Everyone assumes that because the catch can caught oil it’s saving their engine yet its normal for an engine to burn a small bit of oil. Its known that many engines consume oil as part of normal operation including porsche engines. The makers of the engine oil know this and that’s probably why chevy recommends dexos oil is it has additives to keep the valves etc clean and lubricated.
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