Is brown oil a good sign?

Discussion in 'General Subaru Discussion' started by kickin_81, Jan 11, 2004.

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  1. kickin_81
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    kickin_81 Well-Known Member

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    I just changed my oil today w/ Amsoil 5w30. It's been a bit over 2,500 miles since I last changed the oil, and I noticed that the oil wasn't very dark. I thought that turbo engines makes it necessary to change the oil every 3,000 miles, so my question is, is brown oil an indication that the oil could last maybe another oil change? Is it still protecting the motor just as well as if it was new oil? Who here keeps their engine oil in longer than 5,000 miles (what oil)?
     
  2. n/a
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    Amsoil is good stuff. I wouldn't hesatate to run it for 5000 miles in a turbo motor provided there was a quality filter on it.
     
  3. Zola
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    Zola Well-Known Member

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    I don't think forced induction has any effect on oil longevity. You can keep using it as long as all the additives are still there in sufficient amounts and it hasn't broken down too far. The only way to know for sure is to get an oil analysis. I keep Mobil 1 5W-30 in my car for 5,000-6,000 miles (topping up along the way of course) without even thinking about it. I'm sure it could go longer if you changed the filter at some point.
     
  4. WRX1
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    WRX1 _ Staff Member

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    What amsoil are you running?? If you are running the good stuff (not the xl7500) you should be able to go alot longer than that. I usually run my amsoil for about 6-7000 miles. I am running the amsoil filter, and when I change the oil is still pretty light. Last time I changed it, I had about 8500 miles on it (with a trip to chicago), and it was starting to get darker. Amsoil says 25000 miles before a change (replace filter at 12500).

    Russ

    Side note, if you need any amsoil let me know, I will sell it for cost plus sales tax.

    Russ
     
  5. yosmiley
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    yosmiley Subie OG Missin'In Action

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    I use Castro GTX 5w30 in my former Mazda and current Subaru along with the wife's Dodge GrandCaravan. My oil change has always been dark brown except for my wifes Dodge... It's always dark dark dark. I thought I was the aggresive driver. My wife puts in a good 40+ miles to work and back every day... I'm assuming that explain how the oil turns out in the mini-van.

    Castro's been good to me... but with the economy today... if Russ can get it for me at cost... woo who... Amsoil in my next oil change it is.

    Vic
     
  6. kickin_81
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    kickin_81 Well-Known Member

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    I may have to take you up on that offer, Russ. ;) Funny thing was, I got exactly 5 quarts out of the car. Isn't it supposed to only hold 4.9 quarts? :eek:

    IIRC, the Subaru oil filter has a pressure valve that only opens up to bypass oil on a certain pressure level. The Amsoil oil filter only has a film of mesh that is always open. I've been using the Amsoil filter for a long time, but I was just informed that the OEM filter has this feature. Any difference?
     
  7. RallyNavvie
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    RallyNavvie Well-Known Member

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    I use Mobil One but change it every 5000 miles or so, although I don't have to top my oil off between changes :p . The oil is pretty dark by that time but not as dark as I've seen some oil get. Most synthetics these days can be run for much longer.
     
  8. Mark Holden
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    Mark Holden New Member

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    <blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Zola

    I don't think forced induction has any effect on oil longevity.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

    Not in and of itself, but the additional heat from the oil runing through the turbo center section can break down oil much faster.

    WRXen and other recent Subarus are an exception in that they also have a water-cooled center section, so they are less susceptable to cooking the oil than lots of other turbos are.

    That said, if you don't drive a turbo'd car hard enough to warrant 3k mile oil changes, you shouldn't be allowed to keep it :)
     
  9. WRX1
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    WRX1 _ Staff Member

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    As for getting oil, its no big deal. Just let me know what you need. It might take me a couple of days to get it.

    I always dump in 5 quarts when I do a oil change. With the amsoil filter (sdf20) the filter is a little larger, so it actually holds a bit more oil.

    Russ
     
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