Dave,
The manufacturer does know what he is doing, but some of the low viscosity
oil push is for mileage too. If you are west of the Cascades, I'd not be
concerned about bumping up to a 5w20.
Once you are out of warrantee, use the synthetic, but extend the intervals
to make the synthetic more affordable. I've gone to annual changes on all
of my cars, using Mobil 1. The only variance on this theme is my wife's
Volvo XC90. It's a 2.5 liter straight 5 turbo engine in an SUV and after a
year an oil analysis showed that the Aluminum and steel count was a tad
high, so I switched to Redline and the numbers are back to being OK. The
Mobil 1 just didn't hold up for 15k in the turbo engine, but it's fine in
everything else I own and has been since 1981, when I switched to Mobil 1
and annual changes.
It's been 30+ years of annual (spring) oil changes, several cars have come
and gone and I know I'm doing the right thing. It's less expensive, less
work and works just fine.
Jack
-----Original Message-----
From: shop-talk-bounces@autox.team.net
[mailto:shop-talk-bounces@autox.team.net] On Behalf Of Dave C
Sent: Thursday, November 01, 2012 10:22 PM
To: shop-talk@autox.team.net
Subject: [Shop-talk] Oil, again
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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