I own a 95 Civic with the stock D15B3 with close to 250,000 original kms. Everything runs fine and has good compression, but early mornings on a cold start, I can hear a distinct noise which I assume to be of the big end bearing in the crank. It goes away when the motor comes to it's normal working temperature. It has always been on auto fan and with the thermo valve working. I put Shell 10w40 oil.
My question is; Should I change the oil grade to something thinner? Or should I just change the oil brand altogether?
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