Standard Oil Vs Synthetic?

busterrm

solid fixture here in the forum
Grumpy, I have already run my engine and used standard oil with Zinc additive. My question is this: I was wondering if it is unwise to change over to synthetic since the break in is already done. I drained the oil after I ran the engine for about an hour, cut the filter apart and it was clean, no metal particles in the filter so I am good. I am using a Wix filter and am going back and forth on the regular oil.
Lucas has their Hotrod & Classic Car Motor Oil which is standard oil.
Amsoil has their Z Rod that has zinc and rust inhibitor, but it is synthetic.
I don't have a flat tappet, I have a roller cam in the engine.
Just looking for options and/or advice
 
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since your runing a roller cam and its already broken in,
theres nothing preventing you from using either oil or a 50%/50% mix of both for that mater,
synthetics tend to be a bit more heat tolerant,
personally Id stick with the synthetic or a 50%/50% mix of both and change the oil filters at least every
6K-7.5K, miles and oil changes at least every 12-15 k

Some experts estimate that the wear on the rings of an internal combustion engine is as high as 0.001" per 1000 miles of operation when the oil temperature is below 170 degrees F. If the maximum allowable wear is 0.006", how long can you run your engine when the oil temperature is below 170 degrees before you wear it out?"


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just a bit of info, I remember seeing a test on bearing wear and long term durability, where it was proven that at least on the BBC engines there was almost zero gains in long term durability once oil pressure reached 60 PSI, and almost no gains with 60 psi over what was seen at 50 psi, even at higher rpms (5000-7000 rpm under full loads) provided the volume of oil flow and bearing clearances and oil temps were reasonably close to ideal, consistently higher oil temps over about 235F are detrimental to long term bearing life,
but oil needs to exceed 215F intermittently to remove trapped moisture.

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Lucas has their Magnum 15W-40 that is nearly half the price of the hotrod and classic oil, Amsoil is offering 5 free qts with each order! If I order 3 gallon jugs of Lucas and 8qts of Amsoil XL 15wX40 get the 5 qts free, I can change the oil 3 times for $42.16 plus the price of a filter.
ZDDP:
Lucas Magnum 1524
Amsoil XL 1265
Average 1395

Is this enough to keep the wear at a normal rate Grumpy?
 
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