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Will thinner oil reduce cold start rattle?
2000 2.7, 115k. I've had this car for a few weeks now and it has a slight rattle, for less than a second, when started cold. It sounds like lifter noise to me. When I inspected the car prepurchase, I made sure to start it up with the engine dead cold, and I don't remember hearing anything.
As soon as I got the car home, the first thing I did was change the oil to Mobil 1 15-50, car had M1 0-40 in it when I bought it.
So my question is, will the thicker oil make the car more likely to rattle on a cold startup and should I switch back to 0-40?
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