Gear oil capacity '10 2.5i 5MT

SlimJim8804 · 02-26-2013, 10:07 PM

Planning on changing the gear oil in the Impreza tomorrow. I found little information regarding specific information for the non-WRX Impreza.
According to sources the WRX 5mt takes 3.7 qts of 75w-90, does this also apply to the base Impreza? Looking for this info ASAP, I'll be picking up fluid tomorrow to do this while I'm swapping tires.
Thanks.

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Steve2.5i · 02-26-2013, 10:29 PM

75w-90 is correct. As far as how many qts the dealer told me "about 4 qts " but he didn't sound to sure lol but that's just because its Kearny mesa Subaru. I did 3.7 qts n just used the dipstick to measure how much more I needed. Are you doing the tranny + rear diff?

SlimJim8804 · 02-27-2013, 01:32 AM

Quote:

Originally Posted by Steve2.5i

75w-90 is correct. As far as how many qts the dealer told me "about 4 qts " but he didn't sound to sure lol but that's just because its Kearny mesa Subaru. I did 3.7 qts n just used the dipstick to measure how much more I needed. Are you doing the tranny + rear diff?

I'm mounting and balancing a set of tires on it in the morning, so I figured I'd just change the gear oil while it's in the air already. I'll do an oil change in about a month, so ill do the rear diff then. Thanks for the info.

AWDmonk · 02-27-2013, 02:17 AM

Did you not get an owner's manual? Mine lists everything, I would think yours would, too. I got really lucky after I bought my car and found someone with a digital copy of the dealer service manual.

SlimJim8804 · 02-27-2013, 07:29 PM

Quote:

Originally Posted by AWDmonk

Did you not get an owner's manual? Mine lists everything, I would think yours would, too. I got really lucky after I bought my car and found someone with a digital copy of the dealer service manual.

Quite honestly I hadn't considered that. I'm used to having used cars w/o owners manuals, this is a family members car. I was just doing 'ground work' to get some info ahead of time, I was running on a limited timeframe and had to mount+balance a full set of tires.

Tried Penzoil Synchromesh, took ~3.5 qts to read full on the dipstick. The difference is dramatic regarding the quality of shift feel, I've always been a big supporter of this product and it continues to impress me. I'll probably run a short interval and change more frequently as the miles roll on. It's cheaper than an oil change, and the improvement is significant enough.

GEE-OTTO · 02-28-2013, 11:24 AM

Penn synchro mesh hmm never thought about that

I use 2.5 bottles of RedLine Lightweight Shockproof + Motul Gear 300

SlimJim8804 · 02-28-2013, 01:29 PM

Quote:

Originally Posted by GEE-OTTO

Penn synchro mesh hmm never thought about that

I use 2.5 bottles of RedLine Lightweight Shockproof + Motul Gear 300

It was available locally and I've had great success with it in the past.

Ralph47 · 03-03-2013, 08:32 PM

Is this as simple as it seems like it should?

I have an 09 2.5i 5mt and should probably do the tranny and diffs soon as I just passed the 80k mi mark...

JohnM10 · 03-04-2013, 02:50 PM

Quote:

Originally Posted by Ralph47

Is this as simple as it seems like it should?

I have an 09 2.5i 5mt and should probably do the tranny and diffs soon as I just passed the 80k mi mark...

Yes, it is very easy. The hardest part is getting the filll and drain plugs off of the rear diff. Make sure you remove the fill plug 1st to make sure you don't get stranded with no way to fill the diff back up. Get some kind of hand pump as well to pump the oil into the diff.

Steve2.5i · 03-04-2013, 03:20 PM

Quote:

Originally Posted by JohnM10

Yes, it is very easy. The hardest part is getting the filll and drain plugs off of the rear diff. Make sure you remove the fill plug 1st to make sure you don't get stranded with no way to fill the diff back up. Get some kind of hand pump as well to pump the oil into the diff.

Hand pump helped me out alot when I did it. For the rear diff I used a breaker bar + rubber mallet lol I'm not the strongest of guys so that probably took a good 5mins. Overall like he said very very easy.

Ralph47 · 03-04-2013, 04:47 PM

Cool, I will have to look up the rest of the stuff for the diffs and tranny ect...

I think I will make it part of my 100k service then I will do it more frequently after the fact. We will see lol

SlimJim8804 · 03-12-2013, 08:54 PM

Quote:

Originally Posted by Ralph47

Is this as simple as it seems like it should?

I have an 09 2.5i 5mt and should probably do the tranny and diffs soon as I just passed the 80k mi mark...

The gearbox oil is very simple.
Just a torx bit for the drain plug, and fill through the dipstick hole. I had a extended funnel that made the process a breeze. Drove it around the block a little bit, checked the level and finished. It took me ~45-hr as I always do loooong drains when changing any fluids. Especially gear oils. The majority of the time was letting it drain, and slowly filling it to insure it wasn't over full.

I haven't done the rear diff on this car yet, but it's a painless process on other cars.

NH8991 · 03-13-2013, 09:17 AM

Quote:

Originally Posted by SlimJim8804

....It took me ~45-hr as I always do loooong drains when changing any fluids. Especially gear oils.....

Yep, 45 hours is a long time for gear oil change

SlimJim8804 · 03-16-2013, 01:22 PM

Quote:

Originally Posted by NH8991

Yep, 45 hours is a long time for gear oil change

I know! Gotta be thorough.

02-26-2013, 10:07 PM	#1
SlimJim8804 Scooby Specialist Member#: 241943 Join Date: Mar 2010 Location: NNJ Vehicle: 2065 Magic Carpet PSM	Gear oil capacity '10 2.5i 5MT Planning on changing the gear oil in the Impreza tomorrow. I found little information regarding specific information for the non-WRX Impreza. According to sources the WRX 5mt takes 3.7 qts of 75w-90, does this also apply to the base Impreza? Looking for this info ASAP, I'll be picking up fluid tomorrow to do this while I'm swapping tires. Thanks. * Registered users of the site do not see these ads.

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02-26-2013, 10:29 PM	#2
Steve2.5i Scooby Newbie Member#: 293006 Join Date: Aug 2011 Chapter/Region: SCIC Location: San Diego Vehicle: 2010 Impreza 2.5i Newport Blue	75w-90 is correct. As far as how many qts the dealer told me "about 4 qts " but he didn't sound to sure lol but that's just because its Kearny mesa Subaru. I did 3.7 qts n just used the dipstick to measure how much more I needed. Are you doing the tranny + rear diff?

02-27-2013, 02:17 AM	#4
AWDmonk Scooby Newbie Member#: 271442 Join Date: Jan 2011 Chapter/Region: MWSOC Location: Green Bay, Wi Vehicle: 2006 Impreza 2.5i CGM	Did you not get an owner's manual? Mine lists everything, I would think yours would, too. I got really lucky after I bought my car and found someone with a digital copy of the dealer service manual.

02-28-2013, 11:24 AM	#6
GEE-OTTO Scooby Specialist Member#: 201277 Join Date: Jan 2009 Chapter/Region: MAIC Location: Arlington VA Vehicle: 2008 Legacy OBP	Penn synchro mesh hmm never thought about that I use 2.5 bottles of RedLine Lightweight Shockproof + Motul Gear 300

03-03-2013, 08:32 PM	#8
Ralph47 Scooby Newbie Member#: 214774 Join Date: Jun 2009 Location: Southern NH Vehicle: 2009 Impreza 2.5i Dark Grey	Is this as simple as it seems like it should? I have an 09 2.5i 5mt and should probably do the tranny and diffs soon as I just passed the 80k mi mark...

03-04-2013, 04:47 PM	#11
Ralph47 Scooby Newbie Member#: 214774 Join Date: Jun 2009 Location: Southern NH Vehicle: 2009 Impreza 2.5i Dark Grey	Cool, I will have to look up the rest of the stuff for the diffs and tranny ect... I think I will make it part of my 100k service then I will do it more frequently after the fact. We will see lol