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Synthetic change every 10,000. With a filter change at 5,000
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10,000 miles is past my comfort level. I just change oil/filter when convenient for me between 4-5,000 miles.
Whatever you feel comfy with.
Dave
Synthetic change every 10,000. With a filter change at 5,000
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Used to do every 3-3500, but any more 4-4500
would never go 10,000 miles, too OCD
Why? I've ran my Simi 300,000 miles with out changing the oil. But I did have an oil bypass filtration system on. With oil analysis at every 15000 mile filter change. Oil doesn't wear out it just gets dirty. And looses some of it cleaning additive. But make up oil add for what has been lost over that time and at filter changes replenishes those additives .The only reason it got changed then was do to a faulty injector. I've ran several on this kj. at 5000 it was very clean with very little contamination and the oil life was still in the green. During this 5000 miles I added 1 QT of oil at roughly 3,000 miles.Changed filter added a little over half a QT to bring back to full. At the 10,000 mile mark oil came back still good but towards the lower end so dropped oil and replace.
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A 5qt system is vastly different then a 30+qt system using a special filter system.Also adding a qt with a filter change does not replenish additives,slight boost but not nearly what it needs to be.Why? I've ran my Simi 300,000 miles with out changing the oil. But I did have an oil bypass filtration system on. With oil analysis at every 15000 mile filter change. Oil doesn't wear out it just gets dirty. And looses some of it cleaning additive. But make up oil add for what has been lost over that time and at filter changes replenishes those additives .The only reason it got changed then was do to a faulty injector. I've ran several on this kj. at 5000 it was very clean with very little contamination and the oil life was still in the green. During this 5000 miles I added 1 QT of oil at roughly 3,000 miles.Changed filter added a little over half a QT to bring back to full. At the 10,000 mile mark oil came back still good but towards the lower end so dropped oil and replace.
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I used to change conventional oil at 3,000 miles. Now I change synthetic every 6,000 miles. It's probably still on the conservative side but mine doesn't burn any oil between changes either.
If youre smart enough to do the rebates that is lolkidding