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Old 08-20-2009, 05:46 PM   #1
stiskeet
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Default German Castrol Syntec 0W30

I have an 06 STI and was wondering if it's ok to run German Castrol even though it's 0w30, not 5w30 and it's summer time. Thanks in advance.
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Old 08-20-2009, 06:09 PM   #2
thrasher
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There are lots of threads on GC that cover this. The concensus seems to be that it resists shear better than most 5Ws. I run it all year long, and many others do too. Do some searching and you'll find all the info you need (and then some).
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Old 08-20-2009, 08:28 PM   #3
09rexwagon
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Where do you live? If it gets below zero in the winter, the 0w will be good for cold cranking. If you are in a moderate climate, the 0w likely means nothing, but the highlight of GC is below.

Anyway, the 100 degC viscosity (12.1 cSt) is actually in the low 40 wt range so it will likely shear into a mid 30 wt over a 4k oil change so it's a perfect candidate for our engine (as opposed to a mid 30 wt that shears into a 20 wt in 1000 miles....m1/RP 5w30 hint hint).
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Old 08-20-2009, 10:46 PM   #4
txl146
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I run it all year long without any problem. No significant loss of oil like some people experience with mobil1
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Old 08-21-2009, 02:21 AM   #5
RonJitsu
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Quote:
Originally Posted by stiskeet View Post
I have an 06 STI and was wondering if it's ok to run German Castrol even though it's 0w30, not 5w30 and it's summer time. Thanks in advance.
Yes, you can run it all year long.
GC is also more stable than most 5w30's.
IMO, its better than every mainstream 5w30 out there except Amsoil.
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Old 08-21-2009, 02:59 AM   #6
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Quote:
Originally Posted by txl146 View Post
I run it all year long without any problem. No significant loss of oil like some people experience with mobil1
same here. to the t.
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Old 08-21-2009, 03:21 AM   #7
neko
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Quote:
Originally Posted by RonJitsu View Post
GC is also more stable than most 5w30's.
IMO, its better than every mainstream 5w30 out there except Amsoil.
Hell, given its top notch UOA's that show up everywhere (all over BITOG for example), German Castrol 0w30 is probably THE best oil widely avail in stores. (autozone for instance) Excellent for WRX/STi's. And yes, my STi still burns a bit of oil, but less than using Mobil1.

In fact, i think autozone is running a special right now with 5qts and a K&N filter for $28 :P
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Old 08-21-2009, 07:04 AM   #8
Uncle Scotty
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:banging head:

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Old 08-22-2009, 10:24 AM   #9
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Quote:
Originally Posted by Uncle Scotty View Post
:banging head:

Elaborate if you have some quick data. I'm thinking about switching from Rotella to GC. After 9000 miles I've heard my car is starting to stink. Stock cats, zero consumption.
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Old 08-22-2009, 03:37 PM   #10
TedMeyer
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search "German Castrol UOA" -- and make sure when you go to buy it, it's really German Castrol (it will NOT say "Energy Conserving"). I was extremely pleased with my UOA using GC, and it ran well in temps between -20 to 90. I have a case of Redline 5w40 to finish, but I would consider running GC full time.

My UOAs: http://forums.nasioc.com/forums/show...an+castrol+uoa
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Old 08-23-2009, 03:27 AM   #11
bzbuzz
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one piece of advise when you have question about anything here, do not just listen random people here. use search fuction wisely and judge yourself.
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Old 08-23-2009, 01:18 PM   #12
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Quote:
Originally Posted by stiskeet View Post
I have an 06 STI and was wondering if it's ok to run German Castrol even though it's 0w30, not 5w30 and it's summer time. Thanks in advance.
Quote:
Originally Posted by Uncle Scotty View Post
:banging head:

Quote:
Originally Posted by meebs View Post
Elaborate .
****ing idiots thinking that they HAVE to put ****ing 5w30 in their ****ing subaru

when wlll this ****ing insanity end???????????
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Old 08-23-2009, 03:33 PM   #13
AWDenvy
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I bought Castrol 5w30, just to piss Uncle Scotty off.
^_^


No, not really.
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Old 08-23-2009, 06:03 PM   #14
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I've run nothing but 5W30 in my turbo Baja for extended, heavy towing just to irritate Uncle Scotty, too! Beautiful UOAs.

However, in an effort to become less anti-social, I recently switched to 10W30. It's all Renewable Lubes' Bio-Syn oil, which he may or may not be more accepting of, and now that I'm on 10W30, I'm even using their HD product.

I'm curious as to the UOA comparison, however we've sold the small boat we had, and are about to sell the trailer I used to tow. So, I don't know how good a comparison it will be.
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Old 08-23-2009, 09:25 PM   #15
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Quote:
Originally Posted by bulwnkl View Post
I've run nothing but 5W30 in my turbo Baja for extended, heavy towing just to irritate Uncle Scotty, too! Beautiful UOAs.

However, in an effort to become less anti-social, I recently switched to 10W30. It's all Renewable Lubes' Bio-Syn oil, which he may or may not be more accepting of, and now that I'm on 10W30, I'm even using their HD product.

I'm curious as to the UOA comparison, however we've sold the small boat we had, and are about to sell the trailer I used to tow. So, I don't know how good a comparison it will be.


you know what you are doing

most do NOT

THAT is a HUGE issue on this board

stupidity at its finest
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Old 08-23-2009, 11:55 PM   #16
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Yeah, but I couldn't help razzin' you.

For the sake of anyone reading this thread, I run analysis regularly (the expensive but extremely useful kind from Dyson Analysis) and usually have a fairly decent idea what's going to happen before I put a fluid in.

I did decide to run Red Line's 5W20 once in a non-Subaru vehicle that spec'd 5W30. Dyson felt certain that it'd run well on it. Really beat on that vehicle hard for that run. You could see that I had my foot on the floor towing quite a bit from the UOA, but you could also see lower wear than many people get just driving around. Fluid selection is very important if you're not just driving around (and often even if you are), and thinking that a brand name or a number on the side of a bottle is going to save you is just flat wrong.

We've got an interesting custom-formulated 5W20 in service at work. Can't wait to see how it does. No Subarus, of course; primarily American pickups.
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Old 08-24-2009, 09:31 PM   #17
bluesubie
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Quote:
Originally Posted by bulwnkl View Post
I did decide to run Red Line's 5W20 once in a non-Subaru vehicle that spec'd 5W30. Dyson felt certain that it'd run well on it. Really beat on that vehicle hard for that run. You could see that I had my foot on the floor towing quite a bit from the UOA, but you could also see lower wear than many people get just driving around. Fluid selection is very important if you're not just driving around (and often even if you are), and thinking that a brand name or a number on the side of a bottle is going to save you is just flat wrong.
Look at these numbers:

GC's High Temp High Shear is at least 3.5 (to meet European ACEA A3 requirements). Red Line 5W-20's HTHS is 3.2. That's the same or better than most xW-30's in the U.S. Mobil1 5W-30's HTHS is 3.09. I would run Red Line 5W-20 over most xW-30's.

-Dennis
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Old 08-24-2009, 09:50 PM   #18
Uncle Scotty
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Quote:
Originally Posted by bulwnkl View Post
Yeah, but I couldn't help razzin' you.

For the sake of anyone reading this thread, I run analysis regularly (the expensive but extremely useful kind from Dyson Analysis) and usually have a fairly decent idea what's going to happen before I put a fluid in.

I did decide to run Red Line's 5W20 once in a non-Subaru vehicle that spec'd 5W30. Dyson felt certain that it'd run well on it. Really beat on that vehicle hard for that run. You could see that I had my foot on the floor towing quite a bit from the UOA, but you could also see lower wear than many people get just driving around. Fluid selection is very important if you're not just driving around (and often even if you are), and thinking that a brand name or a number on the side of a bottle is going to save you is just flat wrong.

We've got an interesting custom-formulated 5W20 in service at work. Can't wait to see how it does. No Subarus, of course; primarily American pickups.

and you are the ONLY one insane enough to TOW with a BAJA at 10psi boost for extended periods of time

i am quite surprised that you have not melted something......something $$$ or $$$$
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