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Originally Posted by TheDeal526
How good are the Lucas Additives? Do these products actually do what they claim????
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In general, yes. They rarely do everything they claim, but Lucas is a good name. It would be nice to know that your engine requires them before you add them. Altering oil's qualities might be a good thing for some engines and terrible for others depending on their original engineering, state of wear, ring seal, etc. There is really very little way to tell, but saying that one additive is right for every vehicle is like saying red is a good color on someone. It might be a good color for them but not someone else. Engines are as different as people.
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Also, I have a 3.8 V6, Thunderbird with over 154,000 miles. These cars are suppose to be notorious for their head gasket problems.
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The antifreeze is not responsible for blowing head gaskets. That is a function of mechanical pressure from combustion combined with degradation of the gasket. In some cars warped or weak heads and decks make the problem worse, but I don't think the 3.8 suffers from any of those symptoms. Drive it. If it happens, it happens. No real way to prevent it other than driving with less right foot.
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Finally, How good is Castrol High Mileage Oil????
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As good as Castrol's non-hi-mileage oil. Look down a few threads or do a search as this has just been discussed in the last couple days.