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Mr. Dremd; I regularly check the oil in my car. I put some on my finger and supressit it with other finger. ON the other hand i put the same oil but NEW to check if there is a difference between old and new oil. Absolutely nothing. The viscosity is totally the same. If metal particles would be big you would feel it on your finger. There are metal particles in the oil for sure but there are extremely small, so small that even if you put it on your eye they wont hurt. I will keep contacts on this blog and i will report periodically to whats happening with the oil in my engine. I am absolutelly convinced that we never need to change oil in the engine as long as the oil doesnt get contaminated with water, fuel, other external chemicals or contaminants.
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