Changing oil from god knows what to full synth
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This is a discussion on Changing oil from god knows what to full synth within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Quick question, I just purchased a used 06 WRX with 17,890 on it and I have no idea what kind ...

  1. #1
    Registered User Lt. Boom Stick's Avatar
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    Changing oil from god knows what to full synth

    Quick question, I just purchased a used 06 WRX with 17,890 on it and I have no idea what kind of oil was put in the car. Now I doubt it, but would there be any repercussion to changing it over to a full 5W-30 Synth?

    The best thing I bet would be to flush it and then put in the full synth right?

    Thoughts?

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    Geriatric Ginger Mod Rogan's Avatar
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    standard change of oil will be fine.. no need for flushing.
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    Registered User 06WRXturbo's Avatar
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    i don't think you have to flush the engine when switching. I didn't. May be a good idea tho b/c it's relatively cheap and provides peace of mind. May already be synthetic, who knows.

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    Registered User wrx wagone's Avatar
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    Put the synth in.
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    Registered User rr1911's Avatar
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    imo put the synth in and then change it out 2k miles later
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    Administrator TheJ's Avatar
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    Quote Originally Posted by bchslap View Post
    standard change of oil will be fine.. no need for flushing.
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    Registered User Lt. Boom Stick's Avatar
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    Thanks guys, thought this would be the case, just wanted to be sure.

    Quote Originally Posted by TheJ View Post
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    Mace Windu devilfluff's Avatar
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    Flushing oil causes more harm than good IMO.

    The detergents in the oil will clean up any deposits, I'd just short change your first time to get any contaminants from the prev owner out.
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    Registered User QQB825's Avatar
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    bump.

    my new '08 is running regular 10w30. i was told by the dealer that it was not good to change over to synthetic because turbo Subarus have had problems running it. i was a bit surprised to hear this. i figured synth would offer better protection.

    thoughts on this?
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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by QQB825 View Post
    thoughts on this?
    I'm sure there are plenty of thoughts on that but they are as meaningless as your dealer's statement so don't bother considering them. The only thing to consider are the viscosity and API grade requirements stated in your owner's manual and the recent oil TSB released by Subaru. In the TSB the manufacturer's stance on synthetic oils is clearly stated. The manufacturer's stance on synthetic oils is also stated in the owner's manual. Follow the manual to the letter.

    Search here, Nasioc, or any other Subaru forum for the oil change interval notice Subaru released for late model cars. Here's one example but it's not the complete text and some of the interpretations are illogical, so focus on the first two posts (and note you do not have to use the oil mentioned, it's just an example):
    http://forums.nasioc.com/forums/show...castrol+syntec

    EDIT: I've chosen to use synthetic in my Subaru.
    Last edited by SD_GR; 08-29-2007 at 12:37 AM.
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    Mace Windu devilfluff's Avatar
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    Synth is fine as long as you use the correct weight(5w30) and class(most every oil you find in a store will meet the latest standard- but its written on the circle in the corner if you wanna double check) and keep to the factory maint interval.

    My warranty is long expired, so I've chosen to extend my interval and use full synth.
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    Registered User 07STi8U's Avatar
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    Synth oil changes

    I've owned three STi's, two since new, and changed first two oil changes at 1,000 and 2,000 miles with conventional. Then switched to Mobil 1 perm. and followed the OE recommendations for every three thousand. Never a problem!

    My '07 runs great, no leaks, squeaks or smoke and I've been driving it like I stole since it was 2,000 miles old. I now have 20,000 on it. I believe Mobil 1 is the best "Budget" oil change for the money. I'm not sure about what the best filters are to use. I've been using K&N's oil filter with no issues.

    Good luck!

    Quote Originally Posted by Lt. Boom Stick View Post
    Thanks guys, thought this would be the case, just wanted to be sure.



    Happy to be back man!

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    Registered User 07STi8U's Avatar
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    How do you like the '08? Is it built well? I thought the styling was a disappointment!

    Quote Originally Posted by Lt. Boom Stick View Post
    Thanks guys, thought this would be the case, just wanted to be sure.



    Happy to be back man!
    Quote Originally Posted by QQB825 View Post
    bump.

    my new '08 is running regular 10w30. i was told by the dealer that it was not good to change over to synthetic because turbo Subarus have had problems running it. i was a bit surprised to hear this. i figured synth would offer better protection.

    thoughts on this?

  15. #14
    Registered User QQB825's Avatar
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    i love it. being a domestic only owner/driver till this WRX, i think it's a great looking car that drives fantastic. it could handle a little better tho i think in the corners.

    personally, i never cared for the looks of previous WRXs...

    *hides*
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  16. #15
    Registered User 07STi8U's Avatar
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    Any word on the release date of the '08 STi?

    Quote Originally Posted by QQB825 View Post
    i love it. being a domestic only owner/driver till this WRX, i think it's a great looking car that drives fantastic. it could handle a little better tho i think in the corners.

    personally, i never cared for the looks of previous WRXs...

    *hides*

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