Oil Pans and Dipsticks

[Mechie3]

Sharing some info I learned today. Not all STI oil pans are created equal. There is one pan for the 04STI and 05STI, LGT, and OBXT. It has a matching dipstick. There is a second pan for pretty much all other 2.5L pans 06+ WRX, )6+STI, 06+LGT, FXT.

Dipsticks:
The 11140AA120 looks like it fits only 2004/2005 STI and 2005 outback XT and 2.5GT.
The 11140AA150 looks like it fits every other 2.5 motor ever (turbo, NA, etc).

Oil Pans:
11109AA131 ; 11109AA130 fit the same list as the 120 dipstick
11109AA151 ; 11109AA150 fit the same list as the 150 dipstick

Dipstick guide tube:
15144AA011 ; 15144AA010, seems to be the same across all models and not a factor.

What does this mean?

People talk about "upgrade to the STI pan" all the time. The 06+ pan is better, and the dipsticks are different. 06+ dipsticks are shorter, meaning you'll hold more oil if you fill to full.


http://forums.nasioc.com/forums/showpost.php?p=27383408&postcount=36

[FFRSpec72]

On my EJ207v7 engine I used 06-07 EJ25 STi oil pan 11109AA151 - $83.63 and 06-07 EJ25 STi dipstick 11140AA150 - $10.02

[RM1SepEx]

How much oil would you run?

I just installed my STI pan... PN??? (Edit: followed your link, I have the 151 pan and associated pickup tube and windage tray ) and still have my original wrx dip stick. I put in 5 qts of oil and plan on marking the dipstick with the new full level after I start it up again to fill the filter etc... should I run more than 5 qts???

[Mechie3]

I always ran ~4.5 in mine. I think the pan capacity was 4.2, but total engine capacity was higher. I recall a builder years ago recommending just running 5 as it's easier to measure.

[305mouse]

The Saabaru took 4.7, but that wasn't a 2.5, just the old 2.0 turbo.

[Ethan818]

Do anyone know why the 2.0L dipstick is so much longer than either of the 2.5L dipsticks? Is this due to a deeper pan geometry or does the top of the dipstick tube sit higher above the engine?

[FlatironsTuning]

We sell a fair amount of the STI Oil Pans.

The reason that the the 2.0 dip stick is longer is because the 2.0 pan does not have the cut-out for the equal length headers like the STI pan does, so the oil level is lower. That is why the dip-stick is longer.

As has been said, the 2.0 pan does have a higher capacity compared to the 2.5 pan. Capacity of the 2.0 pan is 4.8 quarts, and the 2.5 pan is 4.3 quarts.

http://www.flatironstuning.com/p-2034-06-07-subaru-sti-oil-pan-and-pick-up.aspx

Hope that helps.

[SixStar]

This should muddy the waters, this is just what I had laying about. All dipsticks are held at the same spot on the other end by a straight edge BTW.

35035

[Mechie3]

Killer B told me that their pan is usable with the 05 and 06+ dipsticks. With both sticks it has (at least) 6 qts when it hits the full mark. The 06+ stick should have slightly more as the stick is shorter, thus oil height is higher.

[gwarden]

This should muddy the waters, this is just what I had laying about. All dipsticks are held at the same spot on the other end by a straight edge BTW.

35035
is your straight edge on the end of the handles or the stop for insertion?

[RM1SepEx]

This is where 5 qts puts the oil level with my 05 wrx dipstick and my # 151 STI pan

35064