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Old 12-19-2012, 11:07 PM
99 V10 99 V10 is offline
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I would use a good 10-40 dino oil. With 155K I wouldn't use a synthetic. I have run synthetic once in a new truck I bought. But I can not see where synthetic does anything. I have run many engines 200K on dino oils. The cost of synthetic vs dino I can't see where it is worth it. Plus on older or higher mileage engines it finds places to leak where dino oil won't.
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