I'm getting used to the various engine noises, and based on others here reporting the same, now consider it normal. Will be going to a 10w-30 next oil change to quiet things down a little. Had switched to 5w-30 first oil change, but tried 5w-20 after needing to replace oil again due to an oil leak and dye added to the oil. It's noisier on the 5w-20, no doubt...also when driving the car. But especially during warm up. Yeh, thinner oil flows quicker initially, but as the oil begins to thicken in first 5 minutes, 20w doesn't seem to privide the protective film between engine parts that 30w does...which is a no-brainer.