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Old 03-04-2008, 10:06 AM   #1
Tequila Sunrise
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Question Can I put synthetic oil in my turbo Subaru?

My Forester has 45,000 miles and is out of warranty. I would like to switch to synthetic so that I don't need to change the oil as often, and hopefully, get more miles out of my car.

The service manager at my Subaru dealer told me that I can't put synthetic in the turbo. Is this correct?
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Old 03-04-2008, 10:27 AM   #2
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yes you can change to synthetic

Check the Oil FAQ for recommendations - in particular the appropriate viscosity range for your climate + type of driving

Not all synthetics are equal - if you want to start extending your oil change interval (OCI) then it's best to have a used oil analysis done after your 1st synthetic change to determine that your wear / dilution / shear are within acceptable limits and recommend a suitable OCI for you / that brand.
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Old 03-04-2008, 10:27 AM   #3
bluesubie
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Check the Maintenance FAQ sticky. Do you have an owner's manual? If so, check the synthetic oil info and then show it to your service manager. Then check the New England forum to find another dealer.

Do not assume that you can go longer intervals with synthetics. It depends on the viscosity you use, driving conditions, oil change interval, oil High Temp High Shear, etc. All synthetics are not created equal.

Also a used oil analysis will tell you how long you can run an oil. http://www.blackstone-labs.com/

edit: Nearly the same advice posted at the same time. And welcome to nasioc. Also check out subaruforester.org

-Dennis

Last edited by bluesubie; 03-04-2008 at 10:43 AM.
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Old 03-04-2008, 11:29 AM   #4
Tequila Sunrise
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Thanks for the links. Seems I'll be changing my oil ~ every 3,000 miles no matter what. It is very convenient at my local Subaru dealer because for me to remove the brush pan underneath is a PITA. Plus, they do it for $19.99.
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Old 03-04-2008, 11:40 AM   #5
Mesatchornug
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it won't be $19.99 for synth. unless you mean $19.99+oil...
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Old 03-04-2008, 11:45 AM   #6
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Quote:
Originally Posted by Tequila Sunrise View Post
Thanks for the links. Seems I'll be changing my oil ~ every 3,000 miles no matter what.
.....or use UOA's as Dennis recommended so you know what interval works best for your application.
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Old 03-04-2008, 12:31 PM   #7
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I would not let that service manager near my car; he is a moron or a con man.
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Old 03-04-2008, 04:41 PM   #8
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Just use a dremel tool and cut out a square large enough to get your hand onto your filter. Problem with pan cured. RP
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Old 02-19-2009, 08:12 PM   #9
Mike Wevrick
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Quote:
Originally Posted by Tequila Sunrise View Post
Thanks for the links. Seems I'll be changing my oil ~ every 3,000 miles no matter what. It is very convenient at my local Subaru dealer because for me to remove the brush pan underneath is a PITA. Plus, they do it for $19.99.
Subaru is now recommending 3750 for all new turbo Subarus. (used to be 7500 for light duty and 3750 for severe). They also say that synthetic is OK but to use the same change intervals. IMO 3000 is a waste unless you really beat on your car. I am doing every 4000 or so.

edit: Take whatever your dealer says with a grain of salt. Sometimes they know what they are talking about, sometimes they don't.

Last edited by Mike Wevrick; 02-19-2009 at 08:42 PM.
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Old 02-20-2009, 03:00 PM   #10
AndyH
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I've gone as long as 6,883 miles on Castrol Syntec 0W-30 in my '05 STi with very good results:


Generally speaking, I'm trying to stick closer to a 5,000 OCI mostly just because it's easier to remember and track.
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Old 02-21-2009, 01:47 PM   #11
loyolacub68
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Make the switch now and change every 4-5k.
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Old 02-21-2009, 03:02 PM   #12
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Was this a birthday bump?
Original post - 03-04-2008, 09:06 AM

-Dennis
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