Subaru B9 Trifecta SUV Forum banner

41 - 60 of 77 Posts

·
Registered
Joined
·
405 Posts
Too low of miles to be burning oil.
I read in the Outback forum that they have 3.6 motors that are consuming 2 quarts between oil changes, same experience as I have with the Tribeca. Some feel as if they made a mistake in buying a vehicle that consumes that much oil with such low miles. I understand what they feel. If it is a ring problem, then Subaru should get TSB going that motors having this should be fixed and not just having the dealerships jump through hoops and frustrate customers to the point of selling vehicles or trade them in thinking they got a lemon. Dealerships can only do what car manufacturer says, even if SERVICE MANAGERS know there is a concern. I read where turbo models burn like a quart between oil changes. THE 3.6 HAS NO TURBO!

mstow42 said:
37k miles.
 

·
Registered
Joined
·
405 Posts
The sad thing is that this is a delightful car to drive and its unique appearance turns heads. Even though Subaru will end the Tribeca frame, the power train will still be there in the outback. So if there is a concern, it will continue.
Subaru needs to come out and say that these motors will consume 1-2 quarts of oil between the 3,700 oil change intervals so customers know that it is part of the vehicle characteristics. In my opinion a new motor's dipstick should not be in the low line after 3000 miles between oil changes with under 40,000 miles.
 

·
Registered
Joined
·
405 Posts
Car and a Driver MAGAZINE had a 3.6 Legacy for 40,000 miles and they had to add 7.5 quarts to keep oil level between the lines for that time period. They took vehicle in for oil consumption test as well and it was burning less then a quart in 1000 miles so Subaru called it "normal".
A little disheartening to find this info.
 

·
Registered
Joined
·
405 Posts
Car and a Driver MAGAZINE had a 3.6 Legacy for 40,000 miles and they had to add 7.5 quarts to keep oil level between the lines for that time period. They took vehicle in for oil consumption test as well and it was burning less then a quart in 1000 miles so Subaru called it "normal".
A little disheartening to find this info.
 

·
Registered
Joined
·
70 Posts
On BITOG, everyone is saying that a all of 0W30 and 5W30 that are resource/energy conserving shears down to a 20 weight by it's formulation. Subaru specs 5W30 and consumption of 1 quart/1000miles, sounds about right with the spec'd oil. Also, Subaru also mentions the use of heavier oils is recommended for severe conditions. I would switch to a oil that is not resource/energy conserving like Shell Rotella T6 5W40 or German Castrol 0W30.
 

·
Registered
Joined
·
405 Posts
Went in for oil consumption test again and tech stated that he uses 5w30 mobil 1 without any issues to burning with his Sub. They say nothing about 5w40, especially in an non turbo at dealership.

STIGR-Wagon-Dad said:
On BITOG, everyone is saying that a all of 0W30 and 5W30 that are resource/energy conserving shears down to a 20 weight by it's formulation. Subaru specs 5W30 and consumption of 1 quart/1000miles, sounds about right with the spec'd oil. Also, Subaru also mentions the use of heavier oils is recommended for severe conditions. I would switch to a oil that is not resource/energy conserving like Shell Rotella T6 5W40 or German Castrol 0W30.
 

·
Registered
Joined
·
70 Posts
straight from the book. Subaru's way of words to confuse the end user.
i have never seen a 10W50 or 20W40. you can use 5W40 oil.
NOTE:
If the vehicle is used in areas with very high temperatures or for other heavy duty applications, the following
viscosity oils must be used: API standard: SM or SL
SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50

also note that it says the same thing in my sti service manual.
 

·
Registered
Joined
·
405 Posts
Tech never mentioned 5w40 oil only 5w30, but did mention the synthetic.
What brand 5w40 are you using in your vehicles?

STIGR-Wagon-Dad said:
straight from the book. Subaru's way of words to confuse the end user.
i have never seen a 10W50 or 20W40. you can use 5W40 oil.
NOTE:
If the vehicle is used in areas with very high temperatures or for other heavy duty applications, the following
viscosity oils must be used: API standard: SM or SL
SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50

also note that it says the same thing in my sti service manual.
 

·
Registered
Joined
·
70 Posts
I use Mobil 1 0W40 and it looks to be the standard to measure up to on BITOG. A lot of people use Shell Rotella T6 5W40 especially in the STI's because it's cheap, readily available at walmart, and it does well in oil analysis when used in daily driving and racing. Some STI's have gone up to 6k miles oil changes with success. Plus you'll read plenty of good reviews on the net. I would buy some T6 but it's not available in Guam, but I can get the Mobil 1. It's a good choice for me as Guam's temps are in the 90's and high humidity year round, a lot of stop and go with plenty of hills.
 

·
Registered
Joined
·
405 Posts
Our weather in Summer also runs high 90's to 100 and humidity is 87-90%. is Mobil 1 40 weight about the same a Rotella or is MO 1 SYNTHETIC BETTER?

STIGR-Wagon-Dad said:
I use Mobil 1 0W40 and it looks to be the standard to measure up to on BITOG. A lot of people use Shell Rotella T6 5W40 especially in the STI's because it's cheap, readily available at walmart, and it does well in oil analysis when used in daily driving and racing. Some STI's have gone up to 6k miles oil changes with success. Plus you'll read plenty of good reviews on the net. I would buy some T6 but it's not available in Guam, but I can get the Mobil 1. It's a good choice for me as Guam's temps are in the 90's and high humidity year round, a lot of stop and go with plenty of hills.
 

·
Registered
Joined
·
70 Posts
LORE BECA said:
Our weather in Summer also runs high 90's to 100 and humidity is 87-90%. is Mobil 1 40 weight about the same a Rotella or is MO 1 SYNTHETIC BETTER?
From the all the data I've read on BITOG, M1 has the slight edge in additives, Rotella has the advantage in price. Rotella is definitely bang for the buck.
 

·
Registered
Joined
·
119 Posts
Rotella T-6 is a great product.....the STI guys I know who use it, love it, ones out of warranty are going 5000K mile changes with good Blackstone reports.....bang for the buck, I have seen it on sale at Wally World for $18.00 for 5qt jug....can't beat that price for a full synthetic....
 

·
Registered
Joined
·
70 Posts
give it some time. you'll still burn a little but i'm predicting it'll go away by the next oil change. usually, you'll experience a little consumption due to the difference in formulation. i was consuming oil too and it went away when i switch from mobil 1 5w30.
 

·
Registered
Joined
·
119 Posts
STIGR is right.......it will take a couple oil changes for your engine to get accustomed to the German Castrol.......and it seems that you are better off now with 1/4 quart vs 1 quart that you were stating....also, I found that GC expands as it gets hot like transmission fluid, so always check your oil when the engine is hot; you really might not be low on oil....
 

·
Registered
Joined
·
405 Posts
When hot it shows lower between high and low lines.
I always check it in A.M. at same place in garage to keep it same environment.
cowboy said:
STIGR is right.......it will take a couple oil changes for your engine to get accustomed to the German Castrol.......and it seems that you are better off now with 1/4 quart vs 1 quart that you were stating....also, I found that GC expands as it gets hot like transmission fluid, so always check your oil when the engine is hot; you really might not be low on oil....
 

·
Registered
Joined
·
405 Posts
IT JUST ISN'T RIGHT FOR NEW ENGINE TO BURN OFF ANY OIL even if it is below the 1 quart and 1,200 mile cut off.

But I will follow your directions and see what happens over next 2 oil changes with the German Castrol.
 

·
Registered
Joined
·
405 Posts
Nice read.
I have a 5.7 liter motor in my Toyota truck that runs on thin 5w20 mobil 1 with no NOTICEABLE burn off of oil. I ran the Tribeca for 3 months on the same commute and oil went from 5mm above top of TOP line which is 7 quarts to 3mm above top of low line in 3,500 miles on the TRIBECA. I RUN TRUCK EVERY 5,000 MILE OIL CHANGE INTERVALS. THESE 3.6 MOTORS seem to burn what seems to non SUBARU people excessive oil as noted on MOTOR TREND evaluation of 3.6 LEGACY. They added to maintain topping off motor almost 8 quarts in 40,000 miles of long term evaluation. If I take 5w 40 to SUBARU dealer for oil change they are liable to tell me they wont do oil change due to thick oil. Thus the reason I am trying the thicker 0W30 castrol synthetic. There has to be something they can do to beef up pistons.....to stop this much oil burn off.

Instead of SUBARU going thicker, they are recommending thinner oil of the 5w20 for M.P.G. reasons for their new motors. Not a good formula to reduce burn-off, quite the opposite I.M.O.

I don't mind running thick oil or adding oil but SUBARU has to come out and say these non turbo motors ARE known to burn!
We will see what happens on people going longer O.C. intervals of 5000 miles with 5w20 on 2011-12 SUBARU models, and you know not everyone checks oil every 3-4 oil change or ones a month even. Tribeca is still 5w30.

maxse03 said:
My 05 STi used about 1 quart every 1000 miles and so does my 08 Tribeca on 5w-30. After switching both to Royal Purple 10W-40, the problem pretty much went away. At least I don't have to add between oil changes.

Just some reading: http://allwheeldriveauto.com/why-does-my-subaru-use-oil/
 
41 - 60 of 77 Posts
Top