Top-End Reassembly

The cylinder bore scuffing after only 6000 miles looks alarming.  I don't want to start an oil thread, but I'd use some high ZDDP oil, not just Rotella.  Driven 40 would be good for break-in, run two batches, 400 miles each, then switch to some high ZDDP motorcycle oil, or something like, M1 15W-50, since it has a bunch of ZDDP.  

Nessism wrote:

The cylinder bore scuffing after only 6000 miles looks alarming.  I don't want to start an oil thread, but I'd use some high ZDDP oil, not just Rotella.  Driven 40 would be good for break-in, run two batches, 400 miles each, then switch to some high ZDDP motorcycle oil, or something like, M1 15W-50, since it has a bunch of ZDDP.  

Might be the scuffing looked worse than it actually was. 
Could barely catch a fingernail, and the glaze break hone job (I think) eliminated it.



I'm reluctant to upgrade before the motor shows a reduction of oil use.  
Likely will use Shell Rotella T6 until then.
~~~

Same head BTW...different valves


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daveo wrote:

Nessism wrote:

The cylinder bore scuffing after only 6000 miles looks alarming.  I don't want to start an oil thread, but I'd use some high ZDDP oil, not just Rotella.  Driven 40 would be good for break-in, run two batches, 400 miles each, then switch to some high ZDDP motorcycle oil, or something like, M1 15W-50, since it has a bunch of ZDDP.  

Might be the scuffing looked worse than it actually was. 
Could barely catch a fingernail, and the glaze break hone job (I think) eliminated it.

I'm reluctant to upgrade before the motor shows a reduction of oil use.  
Likely will use Shell Rotella T6 until then.
~~~

Same head BTW...different valves

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M1 15W-50 has 30% more ZDDP than Rotella T6 5W-40.  Even though the M1 is not certified MA2, frankly, neither is T6, even though they put it on the bottle as "meeting the spec of...".  That M1 is super popular with motorcycle guys, and it won't hurt your clutch.
Driven 40 is a dedicated break-in oil with even more ZDDP.  Not sure how much, but a LOT.  It's dedicated for breaking in engines, and avoiding cylinder wall and piston scuffing during early engine life.