John sounds like you are hearing the hydraulic valve lifters pumping back up. If so it ran a little rough and smoothed out as the noise went away. I have mixed synthetic with petroleum based oil and had no problems. Not in a BB chevy but in a high reving honda with mileage over 250K and still doesn't burn oil. Changing to synthetic should have also resulted in some oil leaks as that stuff finds every loose spot. Synthetic is pretty pricy and I have experimented with longer intervals between oil changes. Started at every 2K changed to synthetic and pushed to 6K then to 8K with filter change at 4K and found the car started using oil at 6K, quart every 1K. So now I'm back to 6K with a filter change at 3K and the oil consumption is back at zero. So let us know if that click and clack come back.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I�m handing him tools and he says, "give me that..." and I�ve already got it in his hand or "hand me that....."and I�ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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