Quote:
Originally Posted by Splicer
But it is the engine's heat that will evaporate the condensation and prevent the small accumulation of oil/water emulsion inside the filler cap, and it is heat (not high RPMs) that evaporates water (a normal byproduct of combustion) from the exhaust system.
As to higher RPM -- within moderation (thanks, Moose) it won't hurt a thing and does provide some benefit. But the benefits are indeed more about combustion chamber deposits, and not about removing any gunky buildup from inside the engine.
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1) Heat is generated by increased RPM because of the increased frequency of the explosions occurring in the engine; engines run in closed loop to keep the catalyst at peak efficiency. And if you've ever touched the intermediate pipe after the y-pipe, you'll notice it loses heat rather quickly on its way to the muffler and exit. Toyota used to put "protectors" on their exhaust pipes, which did protect it from the elements, but it also served to keep exhaust temperatures hotter as it insulated the pipes. On my MR2, it's impossible to even touch the muffler during normal operation because of the short exhaust system, which reduces heat loss and inhibits reduced gas velocity (hence why heat wraps and fancy ceramic coatings are available to insulate entire exhaust systems).
2) I never said anything about cleaning gunky engine buildup (that's the oil's job). I said under the oil cap. The chain flings up more than you think, which is why the filler tube and underside of the oil cap will be wet after use (more so than just heat and water/oil emulsification). Besides, water should burn off completely within 5-10 minutes of continuous use. And that doesn't adequately explain wet oil underneath the cap.
Re: Antifreeze in Oil -- 2005 Double Cab, V6
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