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

I see no reason to play with the chemistry of good oils. There is so much written in SAE papers for the testing of the oils for CH-4 and CI-4 that I don't think we are qualified to try to mix anything.
That having been said, there are three types of additives I use or recommend:
Fuel: We have lousy fuel. I use Techron every 5,000 km in my gasoline vehicles and a Diesel Additive in every tank of diesel
Cleaner: I use a product similar to AutoRX when the engine is noisy. Eliminates engine noises incredibly. But just once every 80,000 km or so.
Seal Swell: When Automatic Transmissions are acting up or leaking, power steering leaks, differential leaks.
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