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Car has 150Kmi. Getting intermittent oil pressure warning lamps. Oil is fine otherwise. Manual says this might be expected after hard driving but mine are during stop-and-go commuting when the engine is idling. Always lasts only a moment, often the light only flickers. I've never had this before, even after hard driving. Is this to be expected for a car of this age? What's the most common cause: sludge buildup on the supply side, oil pump wear ... ??
I've had bad experiences before on other makes with "de-sludging" chemicals, but ...
Thoughts?
Thanks.
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