0W-30 Oil? - Subaru Forester Owners Forum
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post #1 of 35 (permalink) Old 02-22-2010, 10:54 AM Thread Starter
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Question 0W-30 Oil?

Anyone running 0W-30 oil?

I noticed WalMart now has Mobil 1 in the big 5qt jug for $23.50 over the weekend.

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post #2 of 35 (permalink) Old 02-22-2010, 11:11 AM
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0w30 is generally good stuff. The Mobil 1 0w30 actually has higher viscosity at operating temps than their 10w30. I have had oil consumption using their regular (not Extended Performance) 5w30, but none with the 0w30. Don't let the "0" scare you. German made Castrol Syntec in 0w30 is one of the better 30 weight oils you can buy.

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post #3 of 35 (permalink) Old 02-22-2010, 11:37 AM Thread Starter
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thx! good info on the Mobil 1. I had been using 10W30 but read up on oil more and want to go back to 5W30 or 0W30 after HG job for better cold lubrication and economy. (I noticed a couple mpg drop going from 5W30 to 10W30 after I first got the car used at 75k).

btw where do you get the german castrol syntec 0W-30 and how much?

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post #4 of 35 (permalink) Old 02-22-2010, 11:39 AM
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You can get the GC at Autozone. It's usually around the same price as M-1. You should do a google search for "German Castrol" to find out how to identify it.

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post #5 of 35 (permalink) Old 02-22-2010, 11:41 AM
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Quote:
Originally Posted by Woody '04 View Post
(I noticed a couple mpg drop going from 5W30 to 10W30 after I first got the car used at 75k).
I would almost guarantee there will not be that much of a difference. Now in the days that Mobil 1 was a true synthetic..the difference between 5W and 10W was the Bottle. Might be a bit different now.

I wouldn't worry about it in NC

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You should do a google search for "German Castrol" to find out how to identify it.
One way is that is says "Made in Germany" on the back

Be careful what you wish for.
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post #6 of 35 (permalink) Old 02-22-2010, 12:00 PM
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german castrol 0w-30 here too..

no problems with it so far.
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post #7 of 35 (permalink) Old 02-22-2010, 12:09 PM
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One way is that is says "Made in Germany" on the back

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post #8 of 35 (permalink) Old 02-22-2010, 12:22 PM
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The "0" part only applies to start-up conditions, and at room temperatures this oil is plenty thick, way thicker than the minimum viscosity needed to protect.

"They don't think it be like it is, but it do"
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post #9 of 35 (permalink) Old 02-22-2010, 12:25 PM Thread Starter
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Quote:
Quote: Originally Posted by adc
Quote:
Originally Posted by Woody '04
(I noticed a couple mpg drop going from 5W30 to 10W30 after I first got the car used at 75k).
I would almost guarantee there will not be that much of a difference. Now in the days that Mobil 1 was a true synthetic..the difference between 5W and 10W was the Bottle. Might be a bit different now.
I ran the car probably 1000 mi or so on (presumed) 5W30 when I first got it and track my gas mileage. Usually fill up at same station and same pump. After changing to 10W30 high mileage Mobil 1, gas mileage decreased over 2 mpg, maybe closer to 3 from previous readings.

edit: i presume 5W30 dino oil of some kind because i bought it Used and serviced with warranty from a good Toyota dealer I had previous dealings with.

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post #10 of 35 (permalink) Old 02-22-2010, 12:38 PM
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I always notice slightly better fuel economy after an oil change, whether it's going from 10w30 to 5w30 or vice versa. After the first tank of gas or two, it returns to normal. Driving habits play a much bigger part in fuel economy than the condition of your oil though.

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post #11 of 35 (permalink) Old 02-22-2010, 01:58 PM
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btw where do you get the german castrol syntec 0W-30 and how much?
$6.99 / Qt + tax at our local Auto Zone.



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post #12 of 35 (permalink) Old 02-22-2010, 03:58 PM
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0W-30 GC FTW. Been running in my '07 for over 60k miles.
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post #13 of 35 (permalink) Old 02-22-2010, 04:36 PM
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Which mobil1 0w30 are you looking at? The new green bottle fuel economy one? I've only seen the green bottle stuff (or is that 0w20?) and the 0w40 which they only have in quart bottles. Do they have an EP 0w30? I'd love to run that during the winter instead of the 5w30 ep.

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post #14 of 35 (permalink) Old 02-22-2010, 04:45 PM
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Quote:
Do they have an EP 0w30?
Doesn't appear that they do: Mobil 1 Extended Performance Fully Synthetic Motor Oil

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post #15 of 35 (permalink) Old 02-23-2010, 07:37 AM Thread Starter
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Quote:
Originally Posted by funkymonkey1002 View Post
Which mobil1 0w30 are you looking at? The new green bottle fuel economy one? I've only seen the green bottle stuff (or is that 0w20?) and the 0w40 which they only have in quart bottles. Do they have an EP 0w30? I'd love to run that during the winter instead of the 5w30 ep.
I saw 0W30 "fuel economy", non-EP 5 gal jug at wal-mart for $23.50. Can't remember if they also had big jug of 0W20 or not.

i'm a little leery of going 0W20 since i sometimes tow, mostly in the summer. i plan on putting oil and temp gauges in, so i may try 0W20 next fall/winter if pressure seems good.

autozone has special now until 3/10 locally $25.99 for 5 qts Castrol Syntec European and a Fram filter. (does say made in Germany on back). I asked if they could discount more to not get the filter and they couldn't. I may ask if they could discount a Bosch or Mobil 1 filter as part of the deal, but they probably can't do that either. guess i may be cutting open a Fram filter to see the bad for myself.

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