Holy cow....when I starter her up this morning(our first frost here in Maryland), all I heard from the engine was clickclickclickclick! Like there was oil starvation or something! Anyway, after 20 seconds, the oil was warmed up and soothed the engine.

I guess that's what happens with 0W-30 Mobil 1 oil if you don't run the engine for about 48 hours? Will there be a problem if I use 0W-30?

owners manual says?
I don't know, but I'm pretty sure that's not the recomended sae rating...
AO

Originally posted by m750
owners manual says?
I don't know, but I'm pretty sure that's not the recomended sae rating...
AO

It says 10W-30. But I've always used 5W-30 til last month.

Subaru's just skittish about approving 0 weight oil. Synthetic 0w30 is about the best possible oil for cold starts. I noticed now that the nights are getting colder that the car is much noisier starting in the mornings.

Originally posted by Jon Bogert
Synthetic 0w30 is about the best possible oil for cold starts. I noticed now that the nights are getting colder that the car is much noisier starting in the mornings.

Yes, I heard that's the best for these regions at this time of year. I live in Maryland, BTW. So no problem to expect, eh? GOOD! :D

I will stick with 5w30. I am sure that 0W30 is perfecty safe, but I think that 5w30 is thin enough for cold starts. After all, it never goes to 20 below. Heck, it rarely gets as low as 0 here. the 5w30 just gives me that feeling that things are both thin and thick enough for cold and hot engines. Mobil 1 all the way.

Yeah, I am running 10w30 mobil one synth, and it takes a second for the car to start.

I run 15w-50 but it is always 200 degrees in this desert :)

Eric

Several of us have noticed that the WRX engine seems to run a little rough if you leave it parked for a couple days. Once the engine warms, it smooths out. Perhaps it's the EJ20 grumbling at us for making her sit still for more than a day. ;)
On a more academic note, some have postulated that it's because of the mid-grade oil used at dealership oil changes. Personally I am going to use some good Mobil 1 or perhaps Royal Purple for my next change and see if that keeps the "grumbling" to a minimum.

Originally posted by Xio
Perhaps it's the EJ20 grumbling at us for making her sit still for more than a day. ;)

I'll drive your car when you're not using it. That'll keep the engine nice and warm for ya! :D

You can call me...the WRX Day Care Driver! :p

not to sound like a prick, but if your owners manual recomends something, why would you (if you weren't sure otherwise) go w/ something different? I use 5w30 in the winter, and 10w30 in normal weather. The only reason why I change is the difference in seasons ... 0-40, and 60-90+, but for your less varried climate, I'm not sure why it would warrent a thinner cool temperature oil (0w30).
Aaron

(sorry to come off like a prick, I'm just wondering why... maybe there is something I'm missing)