Can engine oil which is thicker than recommended cause engine "rattle" or "knocking" ?
wrong oil?
Apr 05, 2010
5 Replies
Maybe.
Only on cold start.
I`m sure I would have noticed.. 99% certain the engine was not as noisy before
it is very unlikely, but worth changing it for the right stuff 'just in case' Did it rattle before changing to the wrong oil?
In message , tomm writes
It would help us if you told us what the car and engine are. It could make a difference with an engine that has hydraulic lifters.
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