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Old 12-23-2004, 04:09 PM   #1
Need Speed
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Default Anyone using 0W30 Amsoil with STi?

I've been using the Motul 5w40 in my '04 STi, but with the cold weather up here in Canada I'm thinkin of switching to the Amsoil 0W30 for the winter, which I have run happily in my previous Audi S4.

Anyone forsee a problem using 0W30 until the spring?

By the way, my STi burns oil pretty badly. I usually need to add a quart or quart and a half between oil changes. The car only has 27K km's. Anyone have the some problem?

Thanks
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Old 12-23-2004, 04:59 PM   #2
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5w30 is what your owner's manual calls for. Why do you think Subaru went to the additional expense to have it stamped into your oil cap? Stop trying to re-invent the wheel, use what you are supposed to.
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Old 12-23-2004, 09:31 PM   #3
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I don't see a problem with it, but as Unabomber said, I just use what Subaru recommends.

Bryan
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Old 12-23-2004, 10:21 PM   #4
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I don't think going to a thinner oil is gonna help with that oil consumption "problem" you talk about...
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Old 12-23-2004, 11:04 PM   #5
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After trying many oils in my 04 STi, M1 10W30, etc , I've concluded that the
best oil for any climate in North America is German made Castrol Syntec 0W30 which can only be found at certain Autozones. This oil flows well at low temps and approaches 40 wt viscosity at higher temps. It is VW,Porsche,etc approved for extended oil change intervals. I found out about at www.bobistheoilguy.com. I also run in my wifes 04 Murano w/ excellent results. I've also extended my OIC from 3000 miles to 6000 miles.

Just my opinion, but the website I mentioned has many people who have had the oil tested after extended intervals w/ very good results.

I'm just worried that Autozone will catch on, so I stock up every time I go t one. I'm up to about 60 qts right now! Just make sure it has the red label & says made in Germany on the back. There is also a 0W30 w/ a yellow label that is made here, but doesn't meet the same specs as the GC.

Quote:
Originally Posted by Need Speed
I've been using the Motul 5w40 in my '04 STi, but with the cold weather up here in Canada I'm thinkin of switching to the Amsoil 0W30 for the winter, which I have run happily in my previous Audi S4.

Anyone forsee a problem using 0W30 until the spring?

By the way, my STi burns oil pretty badly. I usually need to add a quart or quart and a half between oil changes. The car only has 27K km's. Anyone have the some problem?

Thanks
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Old 12-23-2004, 11:09 PM   #6
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Amsoil 0w-30 works awesome in cold weather.

0w-30 winter and 10w-30 in the summer.
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Old 12-24-2004, 01:48 AM   #7
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Thanks guys. As far as using the factory recommended 5W30 goes, now my Subaru service actually recommends using 5W40. And Motul is high-end. That's apparently what Subaru advises them to do in the STi. the W40 just means it is more stable at high temp than the W30, due to more additives.

I agree, Amsoil 0W30 is awesome, and they also have a 5W30. Not sure if using 10W30 in the summer is a little too heavy though.

Must admit I've never even considered Castrol Syntec.
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Old 12-24-2004, 10:29 AM   #8
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It's not more stable, the 40 means it's thinner. Subaru doesn't advise your Subaru dealer to use "high-end oil" either, they advise them to use API certified oil in the proper grade for your car irrespective of brand. If they are telling you Subaru recommends Motul, they are LYING to you so that they can dupe you into a more expensive oil change. You can use Motul or Wesson Oil for all I care, but you'd do well by reading the Oil FAQ for the real deal and if you feel like an advanced user, visit the Bob is the oil guy forums linked in the Oil FAQ.
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Old 12-24-2004, 10:42 AM   #9
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Quote:
Originally Posted by Unabomber
5w30 is what your owner's manual calls for. Why do you think Subaru went to the additional expense to have it stamped into your oil cap? Stop trying to re-invent the wheel, use what you are supposed to.
Quite an arrogant response. Note the poster's location...given the extreme cold temps, nothing wrong with 0/30 for any car exposed to extreme cold temps. Check out the cold pour specs of both Amsoil and M1 0/30 compared to 5/30 and decide for yourself if the added flow at cold temps is something you would like at cold start. All of the oils mentioned here meet or exceed the API specs that Subaru calls for in the manual for their cars, so there is no issue running any of them.

In my location, it rarely sees consistent temps below 20F for long periods of time, and I have garage starts in the AM, and run 5/30 M1 in all 3 of my cars. I have run 0/30 in the past for comparison's sake, and when I did not have a garage

- b
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Old 12-24-2004, 07:53 PM   #10
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You can do like Unabomber and stick with manufacturer's advise and never even mod your car. However 0W30 should be OK in cooler climates.

I wouldn't run it in the summer.

A quart between oil changes? If you change around 3000miles you're using too much oil and I'd have the dealer/ insist the dealer check the car out.

When you broke it in did you use the "drive real easy first 1000mile method"??

If so thats probably your problem. New cars need to break in properly, and that is hard with a lot of on and off throttle load on the motor to properly seat the piston rings. You are probably having blowby caused by a too mild breakin.


Do a search on break in methods you'll see.
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Old 12-24-2004, 08:31 PM   #11
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It is an arrogant statement. If you people wish to go against the advice of Subaru of America, the American Petroleum Institute, and the Society of American Engineers go for it.

Oil FAQ
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Old 12-24-2004, 10:43 PM   #12
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Quote:
Originally Posted by Unabomber
It's not more stable, the 40 means it's thinner.
ABSOLUTELY NOT !! 40 weight is thicker than 30. owners manual states 5w(winter-ability to flow cold)-30 is recommended. 10w-30 & 10w-40 for temps above 0 degrees F. even thicker oil in high temperature/desert conditions.
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Old 12-24-2004, 10:48 PM   #13
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BTW - castrol bought out motul
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Old 12-25-2004, 12:47 PM   #14
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Just an FYI....in another forum, not Subie related we used to refer to Castrol Syntec as "brown death". It had quite a poor reputation for heavy sludge and excellerated engine wear. Just my 2 cents.
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Old 12-25-2004, 02:09 PM   #15
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Quote:
Originally Posted by antimullet
When you broke it in did you use the "drive real easy first 1000mile method"??

If so thats probably your problem. New cars need to break in properly, and that is hard with a lot of on and off throttle load on the motor to properly seat the piston rings. You are probably having blowby caused by a too mild breakin.


Do a search on break in methods you'll see.
My 05 STI has no oil issues at all. I followed the break in method used by this web site. I also have a 700HP+ Corvette Z06 that I did the same thing to. No issues with that car either. In fact I am almost a full .50 second quicker in the quarter mile than 4 other Z06's set up similar to mine. They followed the smooth easy break in, I did the web sites break in.

Engine Break in Secrets
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Old 12-25-2004, 03:01 PM   #16
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I used RedLine 5w30 synthetic for my ~7200 miles up to the arctic and back last February in my STi. No problems - we saw down to -14F ish I think.
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Old 12-25-2004, 03:58 PM   #17
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Quote:
Originally Posted by Unabomber
5w30 is what your owner's manual calls for. Why do you think Subaru went to the additional expense to have it stamped into your oil cap? Stop trying to re-invent the wheel, use what you are supposed to.
Because some retard would put antifreeze or gear oil in there, and then sue subaru.
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Old 12-25-2004, 05:06 PM   #18
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Im with whoop whoop. I did it that way. My stock sti severly walks evo 8's with exhaust on the highway haha. I dont know if i'd use amsoil seeing how its not API approved. But im sure switching to a 0w rating will help with your arctic tempertures.
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Old 12-25-2004, 06:26 PM   #19
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Quote:
Originally Posted by roadtalontsi
Im with whoop whoop. I did it that way. My stock sti severly walks evo 8's with exhaust on the highway haha. I dont know if i'd use amsoil seeing how its not API approved. But im sure switching to a 0w rating will help with your arctic tempertures.
*severely* huh? I needed a good laugh today.

Amsoil is a great proven oil. It's either that or M1 in my car for 38k of hard driving. Not a damn problem. Both are race proven oils.

0w30 is fine in the extra cold. Your subaru won't blow up, the world won't end, SOA won't void your warrantee, the National Council Society of Earl Viscosity Thermal Dynamics Association won't shut down and reevaluate all that is oil. You *might* start a bit easier in the morning when it's -15.......

Take some of these people's responses with a grain of salt. It is the intardweb afterall.......and some people seem to think wise ass remarks and arrogance are helpful.

Happy holidays!
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Old 12-25-2004, 09:08 PM   #20
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Quote:
Originally Posted by Unabomber
It is an arrogant statement. If you people wish to go against the advice of Subaru of America, the American Petroleum Institute, and the Society of American Engineers go for it.

Oil FAQ
Unabomber,

I'm totally confused by all this harsh talk when you yourself have used Mobil Delvac 1 which is a 5W-40.

t
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Old 12-25-2004, 11:03 PM   #21
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I give advice that is correct. I don't always follow it. I was dumb in my "younger days" when I ordered my car and was waiting for it. Since I couldn't drive it, I accessoried it before it got here. My dumb motor oil days are over and now use Mobil1 5W30, but I dumbly change it every 5k only because it's easier for my small brain to remember than all that high math that 7.5k intervals involve.
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Old 12-26-2004, 02:12 PM   #22
Need Speed
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In response to Unabomber suggesting that my Subaru dealer is trying to upsell me on the Motul 5w40 synthetic, and I'm stupid enought to fall for it, well they did not suggest it was necessary, nor that Motul was the only way to go, nor that I should buy it from them.

I wanted to switch to full synthetic at 12,000 km's and was considering 5w30 or 5w40. They carried both the Motul 5w30 and 5w40, and that was convenient. Motul is a good brand, and but they suggested they have been advised that 5w40 is better for the STi. Not that I needed to go to the Motul 5w40.

By the way, isn't the weight of the oil and it's flowing ability at cold temperature reperesented by the 1st number i.e. the '0' vs. '5', and the second (i.e. '30' vs. '40' in this case) representing it's stability potential at higher operating temps? I think the higher operating temp stability comes at the cost of more additives?

Anyway, I've used Amsoil 0w30 in my 2000 Audis S4 (although recommended was 5w30), and used Amsoil 5w30 in my B18C powered Civic. Both great oils.

And no, I didn't think my STi would die if I used either 0w30 in winter or 5w40 in summer inseatd of the recommended 5w30. I was just wondering if anyone had tried it and noticed any difference (e.g. oil consumption, fuel consumption, cold temp startability, etc.).

In any case, I was reasonably gentle on the car in the break-in period, but varied rpm to ensure good piston ring seating. I have, however, done quiet a bit of hard track driving this summer at Mosport, which causes higher oil consumption, naturally.

But my '04 STi also uses about a quart of oil between my regular street driven oil changes at about 5-6K km's. So, I was also wondering if anyone is having similar oil consumption in thei STi. I've heard boxer engines tend to burn oil.

Anyone?
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Old 12-27-2004, 05:56 PM   #23
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I use Amsoil 0-30 in my STi. I ran it for a couple years in my 2.5RS too. Noticeable change in the -10 temps we saw last week switching from the 10/30 summer oil i was using.

Chris H.
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Old 12-27-2004, 07:24 PM   #24
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I used to run Amsoil 5w30 in the summer in my wrx and 0 weight in the winter when I lived in CT...........now i'm in va and with my sti i've run 5w30 since oil change number one with no noted oil consumption in between changes....25k miles on the car now.......amsoils great stuff, I am just not brave enough to go with their 25K change interval....
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Old 12-28-2004, 05:09 AM   #25
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Well i stand corrected. Amsoil is api approved. sorry guys. still trying to think of what isn't aside from like goldenstate. lol
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