Re: motor oil; detergent v non-detergent

Posted by Rob on May 25, 2005 at 13:22:52 from (63.245.133.56):

In Reply to: Re: motor oil; detergent v non-detergent posted by Dean on May 25, 2005 at 13:14:14:

Glad you like the thread, I"ve learn plenty with it. You mentioned "dispersants" so here"s some FYI stuff.

Detergents

In the same way that some chemical compounds are used to prevent engine rust and corrosion, other chem�icals are added to motor oil to help prevent combustion by-products from forming harmful sludge or varnish deposits. Detergents are added to motor oil because combustion causes carbon build-up and deposit forma�tion on the pistons, rings, valves and cylinder walls. Carbon and deposits affect engine temperature, oil circula�tion, engine performance and fuel effi�ciency. Detergent additives clean these by-products from the oil. Some com�bustion by-products slip past the piston rings and end up in the motor oil, which can clog the engine�s oil channels.

Dispersants

While detergents help minimize the amount of combustion by-products, dispersant additives keep those by�products suspended in a form so fine they minimize deposits. They keep the oil in the engine clean while they prevent the build-up of carbon or deposits from burned and unburned fuel and even from the oil itself. Eventually, these suspended particles are removed by the oil filter.

• Amsoil What is Motor Oil page

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