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Re: [Shop-talk] Oil, again

To: Dave C <>
Subject: Re: [Shop-talk] Oil, again
From: Ian McFetridge <>
Date: Fri, 2 Nov 2012 09:44:37 -0400
References: <>
I'm no expert, but I think they go to the thinner synthetic oil to increase
mileage by decreasing drag on the reciprocating parts.  I imagine you could
swap 10W30 dino and get the first oil change analyzed to see if there is an
issue (again, not an expert!).  or maybe extend the change intervals to
make the synthetic more economical.

 I run Mobil 1 in our cars, but only change the oil every 15k on the
toyota, v8 4runner, which makes the synthetic a bit more economical.  I buy
the oil in 5qt cans at Walmart.  I had been testing the oil with
Blackstone, but it always came back saying I could go longer between
changes based on the amount of additive pack that remained.  Our other cars
get free oil changes when the idiot light comes on, but they seem to go at
least 10k miles between changes -- maybe that's another reason some
manufacturers spec synthetics.

- Ian

On Fri, Nov 2, 2012 at 1:21 AM, Dave C <> wrote:

> My wife and I are considering our third Subaru Forester.  We have a 2000
> with 147K miles which is my daily commuter, and my wife has a 2008.  We are
> considering getting a '13 model to replace my 2000. In talking with my inde
> Subaru mechanic (Subaru only, all former dealer mechanics) I found the new
> engine is a DOHC, chain driven cam, shim under bucket engine.  So far, no
> big deal.  I have been riding motorcycle engines with that technology for
> years, although if the valves ever do need an adjustment it's going to be
> ugly. However, apparently Subaru specs 0W-20 full synthetic oil for the
> engine.  I was in the local chain auto parts store today picking up a
> couple of H4s and four five liter jugs of generic 10w30 that I use in just
> about everything and I saw that the ONLY 0w20 oil was Mobil 1 green cap,
> and it's REALLY spendy.
> We really like our Subarus.  We live in rural Washington and live down
> about 2 miles of steep,  semi-paved former logging road that gets snow in
> the winter some years, and the Subarus are all that keep us mobile.  Do
> ya'll think this is anything to worry about? 0w20 just doesn't sound
> right...
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