Oil has little or nothing to do with valve seat recession -- that was all
about leaded (or unleaded) gas.
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 8/29/10 10:03 AM, Barrie Robinson at barrie@look.ca wrote:
> I was paid by Shell to test out their oil on my brand newly restored
> Austin Healey. It was meticulously measured for the dreaded valve
> seat recession and I put a lot of miles on. After this Shell
> measured again (they made a special tool to fit the engine) - and
> voila! - no signs of wear! This during a period when some
> companies were pushing additives
>
>
> At 10:54 AM 8/28/2010, Paul Osborne wrote:
>> I'm with Barney, why all of these exotic oils and lube mixes???
>> Have been using NAPA 20-50 too and with 100,000 + and in 2 cars
>> , regular changes all is just fine. Guess there is a need to spend $$ .
>> paul
>>
>>
>>> Chuckle. Something wrong with "the average LBC"? My MGA fairly
>>> often does 500 miles in a single day. 385,000 miles and counting.
>>> So far I do not worry about ZDDP, except during a new cam break in
>>> period. I run NAPA 20W50 in summer and 10W40 in winter. Current
>>> engine has 75,000 miles, going strong, never had the bottom end apart.
>>>
>>> Barney Gaylord
>>> 1958 MGA with an attitude
>>> http://MGAguru.com
>>>
>>>
>>> At 11:23 PM 8/27/2010 -0500, "Ron S" (<iverside> wrote:
>>>> The street version does not contain zddp. VR-1 does contain zddp
>>>> and is labeled for off-road use only but does not contain the
>>>> high milage additives of the street version. It is meant to be
>>>> changed after every race, or about every five hundred or so miles.
>>>> This is about the milage the average LBC `weekend tourer' does in
>>>> a driving season in a moderate climate area.
>>>> ....
>> ___
>>
>> --
>> Paul Osborne
>> University of Rochester
>> Engineering & Technical Services
>> Department of Electrical and Computer Engineering
>> 201 Hopeman Bldg River Campus
>> Rochester, New York 14627
>> 585-275-5226
>> paul@ece.rochester.edu
>
> Regards
>
> Barrie
> barrie@look.ca
> 705--721-9060
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