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Old 03-08-2011, 09:25 AM
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charlieb charlieb is offline
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when some1 starts talking about a true synthetic it usaully talks about the base that it is made of or starytys with.all sythetics start witha base that has all impurities removed than additives are added for viscosity/akaline/acid reducers/cleaning agents stabilizers and so on .as for sythetic oil changed at 5k miles i dont believe it can cause sludge because oil has to break down and seperate and turn to tar(sludge) and yes amsoil and mopbil1 are the tops in most independant tests but around here are very expensive compared to some synthetics that are good enough.todays dino oils are better than oils of 70s,80,90s that were notorious for causing sludge.oils made from group1 and group II bases.
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