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Oil Additives Bad For Aluminum Blocks?

A team of chemists and mathematicians at the University of Western Ontario deduced that most oil additives are complicated compounds containing zinc and phosphate. They then used computer simulations to find out what happens "at a molecular level when a film of oil containing additives is compressed between two hot, hard surfaces" like engine parts. They concluded that as the pressure rises, the molecules of zinc and phosphate form cross-links with each other, according to a science report in The Washington Post. In engines of steel alloys, this process helps minimize wear. But not so in aluminum engines, where the cross-linked molecular hash becomes harder than the metal and abrades the aluminum surfaces. In other words, if these guys are right, additives are good for engines with steel parts but potentially harmful if used in engines with major aluminum parts, especially on wear surfaces. Experts at the American Petroleum Institute told TheCarConnection they were not familiar with the Ontario study. -Mike Davis
 

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Most "normal" oils have Zinc and Phosphates in them. Zinc is an ANTI-WEAR additive. Phosphate is a detergent additive.

Bearings have been made out of lead, aluminum and other soft metals. They support harden/forged (Cranks and Cams), guess what? No sudden bearing failures in aluminum block motors.

Rover/MG/TVR has been using Aluminum blocks since the 60s. If there was a problem you would have heard about it LONG before now.

Most motors have aluminum heads even if they have Iron blocks. The cast or forged cams ride in the aluminum head WITH NO BEARINGS. The only lubrication is OIL. They survive fine for well over 200,000 miles.

Assuming what this "report" claims were true, it would only serve to HARDEN the soft metals, and thus REDUCE wear, not increase it!

Junk science at it's finest.
 
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