Lots of good common sense information on oil is available here:
http://www.quakerstate.com/pages/carcare/whattoknow.asp
Michael Salter
www.precisionsportscar.com
-----Original Message-----
From: owner-healeys@Autox.Team.Net [mailto:owner-healeys@Autox.Team.Net] On
Behalf Of WILLIAM B LAWRENCE
Sent: Thursday, December 23, 2004 2:48 PM
To: Jon McLeroy
Cc: Healeys
Subject: Re: Oli pressure and Oil viscosity
I think the detergent in the oil is meant to suspend soot and microscopic
particles from the combustion process (shouldn't be a problem in a
geartrain). I don't think it will suspend anything large enough to cause
damage to gears or clog passages in the OD. Large particles are caught in
the screen ahead of the OD pump.
Bill Lawrence
On 12/23/04 11:06 AM, "Jon McLeroy" <jfm@spyderinternet.com> wrote:
> At 10:43 AM 12/23/04 -0700, you wrote:
> Bill
>
> You are absolutely correct about the EP in Hypoid oils.
>
> However the reason for non-detergent is to let any particles of metal or
> trash settle out to the bottom of the case and not be circulated into the
> small passages in the OD. Detergent oils will suspend and continually
stir
> these around as there is no real filter in the gear box overdrive system
to
> collect and hold them. Some have a magnetic drain plug to help collect
> bits of metal and should be cleaned every gear box oil change.
>
> Jon
>
>> EP or Extreme Pressure additives are meant for gearsets having a sliding
>> contact, such as hypoid gears in the final drive. EP oils should not be
used
>> in any assembly requiring operation of a friction component to assure
proper
>> operation such as synchronizer cones in a transmission or conical clutch
>> brakes in an overdrive. Engine oil is the proper lubricant for these
items
>> per the manufacturer and I don't think the "detergent/non-detergent
question
>> even comes into play.
>>
>> Bill Lawrence
>
> Classic Auto Lubes
> 12803 CR 1222
> Tyler, Tx. 75709
> Ph: 903-561-4858
> Fax: 903-561-7177
> Email: jfm@spyderinternet.com
> www.classicautolubes.com
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