[AT] Synthetic Oil

[Henry Miller]

I've seen reports that your least wear from oil is the 7000 to 8000 mile
range, it takes that long for oil to break in. With multiweight oils
they design the molecules a little too long so that over time when heat
breaks them down to shorter molecules that are actually better they
still protect you. Go much longer of course and more break down and then
things get bad. 

I have 245000 miles on my VW, and hoping for another 100000.

In my 7.3 I put amsoil 30000 mile oil in with a bypass filter. I need to
do an oil analysis some day, I barely put 5000 miles on it a year so I
want the oil to last a long time. 15 quarts of oil is expensive. 

-- 
  Henry Miller
  hank at millerfarm.com

On Sun, Nov 13, 2016, at 08:17 PM, Spencer Yost wrote:
> The only bad thing about my VW diesel(beside dieselgate) , is that it
> requires a synthetic oil that's pretty expensive.   And it called for oil
> change intervals of 10,000 miles.  I've never been a fan of oil change
> intervals that are that extended and I am certainly not a fan of
> expensive synthetic oil.  But because of that expense I decided to use
> Blackstone lab's oil analysis reports to ensure that these extended
> intervals actually were valid. 
> 
> After the free oil changes up to 36K miles, I changed  the oil at 10,000
> miles and sent a sample. Oil was absolutely great and still within spec.
> Next oil change I want to 11K and still within spec.  And so on our way
> up to 13,000 miles.  Oil was still completely 100% within spec and no
> metals that would indicate excessive wear.  I stopped there but I could
> probably could change at 15K.  
> 
> So I do believe in those 10,000 mile intervals with synthetic oil for
> that engine.  I'll be glad to post the reports if anyone's interested.
> 
> However....
> 
> I did it for my Ford power stroke 6.0 L engine too.  The shear properties
> of synthetic oil begin to degrade at 10k miles. So I use regular Dino 
> oil and change every 3000 miles on that one.
> 
> Hope this helps,
> 
> Spencer Yost
> 
> 
> 
> Spencer Yost
> 
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