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Reply to "What's the best oil additive on the market?"

Fact is, if an additive is used and it changes the chemistry of an API approved oil(and it will), you will void the engine warranty. If you go after the lubricant, you have voided their guarantee. If you feel you need an addative, use a better oil! 98 Ford E-350 w/ 415,000 miles, 20,000 mile oil changes and 10,000 mile oil filter changes.

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