Oil consumption

Discussions specific to Austro engines

Moderators: Rick, Lance Murray

Post Reply
User avatar
Boatguy
5 Diamonds Member
5 Diamonds Member
FIRST NAME: Russ
Aircraft: DA40NG
Registration: N454M
Airport: O69

Posts: 752
Joined: Mon Jan 22, 2018 4:48 am
Has thanked: 344 times
Been thanked: 483 times

Oil consumption

Post by Boatguy »

Our Austro engines only require an oil change every 100hrs. There has been some discussion at my maint shop about whether to add 6 liters or 7 liters at the oil change, the thinking being that more than 6 liters just ends up being blown out the breather.

I've tracked my engine for the last two 100hr cycles. The first time we changed and added 7 liters, then I added another 1/2 liter. The second time we added 6 liters and I've added 1 1/2 liters. So my conclusion is that the oil consumption is not dependent on the starting oil level.

What's your experience with the Austro engines and oil consumption?
User avatar
NDCDA62
3 Diamonds Member
3 Diamonds Member
FIRST NAME: Nigel
Aircraft: DA62
Registration: DINDC
Airport: EDRY

Posts: 118
Joined: Thu Aug 02, 2018 3:15 pm
Has thanked: 61 times
Been thanked: 63 times

Re: Oil consumption

Post by NDCDA62 »

Hi Russ -

From my experience, the oil level should ideally be kept at the half way mark between min and max. Anything above that is just consumed away. At the half way mark, consumption is really minimal.
User avatar
jb642DA
4 Diamonds Member
4 Diamonds Member
FIRST NAME: John
Aircraft: OTHER
Registration: N2691Y
Airport: KPTK KDTW

Posts: 309
Joined: Thu Feb 16, 2017 5:16 pm
Has thanked: 50 times
Been thanked: 139 times

Re: Oil consumption

Post by jb642DA »

I've seen the same results as Nigel.

I keep the level at the 1/2 way point and maybe add 1/2 - 3/4 liters over 100 hours (per engine)
1980 414A - N2691Y (current)
DA62 - N100DA 62.078 (sold)
DA42TDi - N742SA 42.AC112 (sold)
User avatar
neema
3 Diamonds Member
3 Diamonds Member
FIRST NAME: Neema
Aircraft: DA42-VI
Registration: N112NG
Airport: KFAT

Posts: 198
Joined: Fri Dec 05, 2014 5:43 am
Has thanked: 33 times
Been thanked: 35 times

Re: Oil consumption

Post by neema »

I think there's a stronger correlation to oil consumption and power settings. If we cruise at 85%, we'll need a quart every 10-20 hours or so. Sticking to 75% cruise power, we've gone the whole 100 hours without a quart.

For reference, we use Castrol Edge A3/B4 0W-40
User avatar
Boatguy
5 Diamonds Member
5 Diamonds Member
FIRST NAME: Russ
Aircraft: DA40NG
Registration: N454M
Airport: O69

Posts: 752
Joined: Mon Jan 22, 2018 4:48 am
Has thanked: 344 times
Been thanked: 483 times

Re: Oil consumption

Post by Boatguy »

I cruise at 85%. I add 6.5l at the oil change, and then 1.0 - 1.5l in between. I use the Shell oil.

I have noticed some drips from the oil breather in the hangar. My experience with MB diesel car engines was that they did not burn any oil between changes and I suspect that most of the lost oil in the Austro is being blown out the breather. The belly of my plane seems to be where much of it ends up!
User avatar
dmloftus
3 Diamonds Member
3 Diamonds Member
FIRST NAME: David
Aircraft: DA40
Registration: N868US
Airport: KLZU

Posts: 93
Joined: Thu May 07, 2020 3:38 pm
Has thanked: 58 times
Been thanked: 41 times

Re: Oil consumption

Post by dmloftus »

Boatguy wrote:
Wed Oct 28, 2020 1:44 am
I cruise at 85%. I add 6.5l at the oil change, and then 1.0 - 1.5l in between. I use the Shell oil.

I have noticed some drips from the oil breather in the hangar. My experience with MB diesel car engines was that they did not burn any oil between changes and I suspect that most of the lost oil in the Austro is being blown out the breather. The belly of my plane seems to be where much of it ends up!
The IO-360 also blows a fair amount onto the belly. I stopped mounting my camera on the rear tie-down because it gets coated with what I'm assuming are oil and unburnt combustants, resulting in a mess on my camera and blurry videos. Still I only burn about a quart every 20 hours.
User avatar
Boatguy
5 Diamonds Member
5 Diamonds Member
FIRST NAME: Russ
Aircraft: DA40NG
Registration: N454M
Airport: O69

Posts: 752
Joined: Mon Jan 22, 2018 4:48 am
Has thanked: 344 times
Been thanked: 483 times

Re: Oil consumption

Post by Boatguy »

dmloftus wrote:
Wed Oct 28, 2020 9:12 pm
Boatguy wrote:
Wed Oct 28, 2020 1:44 am
I cruise at 85%. I add 6.5l at the oil change, and then 1.0 - 1.5l in between. I use the Shell oil.

I have noticed some drips from the oil breather in the hangar. My experience with MB diesel car engines was that they did not burn any oil between changes and I suspect that most of the lost oil in the Austro is being blown out the breather. The belly of my plane seems to be where much of it ends up!
The IO-360 also blows a fair amount onto the belly. I stopped mounting my camera on the rear tie-down because it gets coated with what I'm assuming are oil and unburnt combustants, resulting in a mess on my camera and blurry videos. Still I only burn about a quart every 20 hours.
The difference is that oil changes for an Austro engine are every 100hrs and they use synthetic oil. So while you burn/blow 5qts in 100hrs, the Austro burns/blows 1.5qts. Or at least that's what my engine seems to consume.
User avatar
CFIDave
5 Diamonds Member
5 Diamonds Member
FIRST NAME: Dave
Aircraft: DA62
Registration: N62DV
Airport: KJYO

Posts: 2239
Joined: Wed Nov 07, 2012 3:40 pm
Has thanked: 154 times
Been thanked: 1019 times

Re: Oil consumption

Post by CFIDave »

I've always put the full 7 quarts (liters) in after each oil change (BTW, I also use Castrol Edge A3/B4 0W-40 since I can buy both 5 quart and 1 quart bottles very inexpensively off the shelf at the local WalMart).

And I usually need to add only 1 quart roughly 2/3 of the way through each 100 hour oil change interval to bring oil to the half-way point between the full and low marks. This has been consistent on both engines of our DA42-VI and DA62. We normally cruise at 75-80% power.

This is totally different from my Lycoming DA40's IO-360, where it seemed I was regularly adding oil (to the 6 quart level only). If I topped it off, I quickly blew out a couple of quarts, making a big mess on the belly until consumptions stabilized around 6 quarts.
N62DV DA62 62.056
N42DA DA42-VI 42.N117 (sold)
N811ET DA40 XLS 40.874 (sold)
KJYO Leesburg, Virginia
User avatar
Rich
5 Diamonds Member
5 Diamonds Member
FIRST NAME: Rich
Aircraft: DA40
Registration: N40XE
Airport: S39

Posts: 3238
Joined: Mon Aug 30, 2010 12:40 pm
Has thanked: 86 times
Been thanked: 616 times

Re: Oil consumption

Post by Rich »

Obviously we're digressing a bit into the IO-360. I have the M20 oil separator and typically fill it with 8 qts at oil change. When it has come down below 6 qts. I go ahead and change it again. This usually comes out to just short of 25 hours.
2002 DA40: MT, PowerFlow, 530W/430W, KAP140, ext. baggage, 1090 ES out, 2646 MTOW, 40gal., Surefly, Flightstream 210, Orion 600 LED, XeVision, Aspen E5
User avatar
Boatguy
5 Diamonds Member
5 Diamonds Member
FIRST NAME: Russ
Aircraft: DA40NG
Registration: N454M
Airport: O69

Posts: 752
Joined: Mon Jan 22, 2018 4:48 am
Has thanked: 344 times
Been thanked: 483 times

Re: Oil consumption

Post by Boatguy »

Rich wrote:
Wed Oct 28, 2020 11:47 pm
Obviously we're digressing a bit into the IO-360.
Yes. I didn't want to start another Lycoming vs Austro discussion. I just wanted to know what other Austro engine owners are experiencing.
Post Reply