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
On 12/23/04 8:37 AM, "Jon McLeroy" <jfm@spyderinternet.com> wrote:
> Greg and All
>
> Penrite Oil's recommendation for our Healeys is HPR 30 a 20W/60
> viscosity. The older cars do really prefer a thicker oil, when these cars
> were manufactured there was no such thing as multi-viscosity or synthetic
> oils.
>
> I run it in my 54 BN1 and with an non-rebuilt engine that leaked badly with
> Castrol 20W/50 but with the HPR 30 has cut down on oil usage and very
> little to no leaking. Also in the gear box I have Penrite Gear Oil 30 a
> non detergent 20W/60, which also leaked but not anymore. In the
> differential is Mild EP, recommended for the early 4 stud axle when the 5
> stud was introduced in the BN2 the recommended flavor is Hypoid 80W/90.
>
> If any one would like a brochure packet please furnish your mailing address
> and I'll get one in the mail. Should you have other cars besides Austin
> Healeys let me know and I will include a Penrite Lubrication Recommendation
> sheet for each.
>
> If I can be of service just let me know.
>
> Merry Christmas and Happy New Year
> Jon
>
> At 08:24 PM 12/22/04 -0600, you wrote:
>> Rich, 20-50 is better for our engines, newer engines use tighter tolerances,
>> so the thinner oil is better to flow into those tight spaces and lubricate
>> everything quickly and thouroughly, on the old healeys and other old cars
>> with greater tolerances the thicker maintains the oil pressure betteroil and
>> provides a greater cushion or film between the journals and the bearings.
>>
>> I think most on the list run 20-50 or some other thick weight of oil.
>>
>> Greg Lemon
>> 54 BN1
>
> 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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