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I think the new style valve stem seal - updated version not allowing the oil to pool inside the seal should make a big difference. After thinking about AGAs description of the improvements, it makes perfect sense on why the old seal style allowed so much oil consumption. The top of the valve guide was constantly submerged in a puddle of oil. The new style has removed that cavity, so even as the new seal wears, the oil will naturally want to expel to the outside of the seal. So the moral of this story is, be sure when you replace your seals you have purchased the new style (red in color).
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