jim beam wrote:
> jim beam wrote:
>> here's my last oil analysis:
>>
>> aluminum 3
>> chromium 1
>> iron 23
>> copper 6
>> lead 2
>> tin 0
>>
>> cSt viscosity at 100C 10.18
>> insolubles 0.3%
>>
>> what was my change interval? bonus points for the brand of oil.
>
> well, as the keen students of google were quickly able to ascertain, it
> was indeed 12k miles. full credits to to them, especially to joe who
> got the oil right, but i award a "good effort" to al for castrol since
> that is my #2 choice.
>
> those numbers are pretty darned good btw, and if you care to check other
> analysis figures from other engine types others have posted around the
> web, you'll realize that honda make a darned freakin' good engine based
> on the iron content. iron is mostly cam wear and numbers in the
> hundreds are not uncommon for other makes of engine.
>
> expanding further on the iron thing, the main reason i got this analysis
> done this time was because a couple of years ago, i had to do a quickie
> head gasket change, and simply didn't have the time to practice proper
> cleanliness. the cam got some grit on it, and thus got some big old
> scrape marks on it as some grit particles got trapped and dragged on
> around the lobes. i changed the oil again the following weekend, and
> left it thinking this would be my op****tunity to go for a jdm motor
> change in the not too distant. well, here we are running mobil 1 a
> couple of changes later, the motor still runs like a champ, and the cam
> lobes look exactly identical, all scraped up!!! with a normal oil, i
> would have expected the worst of it to have worn down by now as part of
> the normal overall abrasion process. however, it appears that wear,
as confirmed by the oil analysis,
> even on these uneven surfaces, is absolutely minute. great oil - i
> recommend it.
|
