[Mgs] ZDDP (Again)??!!??

Wed Jan 30 08:08:15 MST 2013

Folks,

I am with Barney!  So I will go to Canadian Tire and to get a a 
Teflon coating and buy asbestos underwear (with double acting, non slip flaps)
I have told this story several times already but here it goes again............
Shell used my restored Austin Healey BJ8 with rebuilt engine to test 
wear using their lead free fuel.  They made a special measuring 
device and took enormous care to measure the wear due to my driving 
(reasonably hard but not auto-cross ertc) the car for a 
year.   Result - no measurable wear !

At 08:16 PM 29/01/2013 -0600, Barney Gaylord wrote:
>I try not to get involved in religious wars, but I am coming to 
>Paul's support here with considerable experience of my own.  I have 
>build a number of MGA engines using a Crane Fast Street Cam (with a 
>bit of extra lift), Heavy Duty valve springs (more than stock spring 
>force), short tappets and long pushrods from the 18V engine, and 
>sometimes alloy spring caps (but not always).  A couple of these 
>engine I have done for other people, and no complaints from them.  A 
>couple of these engine I have run in my own car.  I nearly always 
>drive it like I stole it.  I have done lots of competition work in 
>SCCA autocross events (and some local club events).   In short, it 
>is an uprated engine driven by a heavy foot, sometimes at 7,000 rpm 
>during competition.
>
>For build it gets lots of standard grease on the cam and tappets 
>(although I would go along with the cam lube recommended by the cam 
>manufacturer).  For first run and break in the engine runs 2500 rpm 
>for 20 minutes with no load (to run in the tappets).  After 
>re-torque it can go racing, right out of the box, although it may 
>take up to 500 miles for the rings and cylinder walls to loosen 
>up.  I use 20W50 oil for the break in, change it at 500 miles, then 
>run 20W50 in warm weather and 10W40 for a considerable amount of 
>winter driving.  I use almost exclusively NAPA brand oil which I 
>think is made by Valvoline, nothing special, just regular street car 
>engine oil.  I change oil and filter at 4000 mile intervals.
>
>The engine currently in my car now has 88,000 miles, running like a 
>champ, and very good cam and tappets.  I have never used any special 
>additive in the oil (accent on no additional ZDDP), and I don't 
>intend to do so.  I'm sure most of the hype about ZDDP additives is 
>over blown and unnecessary.  I'm also sure most of the discussion 
>and concern for lowered ZDDP content in modern motor oil is a waste 
>of concern (although I wouldn't chastise anyone for adding ZDDP to 
>the oil for the break in period of a new engine if it makes them feel good).
>
>I do believe that success and long life of a new cam and flat 
>tappets depends greatly on quality of the parts.  I would never 
>trust a reground cam to be properly hardened, and I would exercise 
>proper concern for procuring good quality tappets with adequate 
>hardness.  I firmly believe that most (if not all) of reported 
>premature cam failures are a result of sub-standard parts or 
>improper installation, and none of it has anything to do with 
>lowered amount of ZDDP in modern oil.
>
>All comments are welcome, as I stand resolutely with Teflon coating 
>and asbestos underwear.
>
>Barney Gaylord
>1958 MGA with an attitude (and 400,000 miles)
>http://MGAguru.com
>
>
>At 04:01 PM 1/29/2013 -0800, Max Heim wrote:
>>I just want to point out two things:
>>
>>- You apparently don't drive very hard.
>>
>>- You have a low-compression motor.
>>
>>Higher-performance models used for rallies and track days may have a
>>completely different experience.
>>
>>As they say, YMMV...
>>....
>
>
>>on 1/29/13 3:46 PM, Paul Osborne at paul at ece.rochester.edu wrote:
>> > Ok, here we go . I'm going to be the wrench in the works. 6 
>> years ago I fully
>> > rebuilt an 18V engine and placed it service in my 74 BGT. This is a daily
>> > driver, no show car here , nice but a driver.
>> > The clock reads 72000miles. since that time I have done the 
>> regular maintance
>> > , a set of brakes and tires . Now I drive about 500miles to my cottage all
>> > most 3 times a month from may to oct.
>> > I use Quakerstate 20w50 oil.    only     I have noticed nothing 
>> but running
>> > well.    My opinion,  may there is a need for this additive, maybe it may
>> > help, but I owen and have owen 5 mgs . my GT
>> > I bought new, and I see no adverse problems with the oil I use in my cars.
>> > ....
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Regards

Barrie
barrie at look.ca
705-721-9060 