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04-09-2015, 10:37 AM | #26 | |
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The NASIOC Oil Selection Guide
Quote:
That's very Aussie of you. http://www.bobistheoilguy.com/forums...pics/3691230/1 See comments and Honda chart posted by some other prisoner island dude (although it's not specific to racing or 50 and 60 grades). IMO, 15W50 is fine if you have an open class rally car. Otherwise a thinner oil with the right additive package (as gp points out) is a better choice in most racing applications.
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Last edited by bluesubie; 04-09-2015 at 10:55 AM. |
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04-09-2015, 10:57 AM | #27 |
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Excellent write up thank you!
Love to hear your thoughts on Amsoil Series 3000 5w30 in a 13 wrx? Mainly DD and about 6 Autox and 1 or 2 track days a year. Your next write up should be about understanding oil FILTERS? Last edited by ConBroMitch; 04-09-2015 at 12:03 PM. |
04-09-2015, 12:49 PM | #28 | |
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Quote:
http://www.bobistheoilguy.com/forums...Number=2583966 http://www.bobistheoilguy.com/forums...Number=2952369 |
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04-09-2015, 01:09 PM | #29 | |
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04-09-2015, 06:15 PM | #30 | |
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Quote:
Just remember the 50% rule for shear - HT/HS is reduced by 50% of what KV100 is reduced by. Really, RT6 is as robust as you should ever need in an EJ Subaru, if your oil temps are so high that you "need" 50 grade, get a bigger oil cooler. |
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04-09-2015, 11:40 PM | #31 |
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Any comments regarding Schaeffer Manufacturing Company's Supreme 9000 5w-40?
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04-12-2015, 07:25 PM | #32 |
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This thread is superb. Thank you gpshumway for such a thorough and near dissertation level journal on oil selection and the "why?" behind such selection.
If you are ever in the Deep South, I owe you some cold beers. |
04-12-2015, 07:27 PM | #33 |
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04-18-2015, 01:06 PM | #34 | |
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I will follow-up with a BSL sample test. |
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04-18-2015, 03:46 PM | #35 | |
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Quote:
it IS the best commonly available, lowest cost oil.... it IS damn good, and 7k mile OCI isn't any issue with it unless using e85 |
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04-20-2015, 11:58 AM | #36 | |
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Quote:
Exactly. One could easily argue that several oils are "better" than RT6. Red Line 5w30 for instance is "better" than RT6, but if you're operating your engine in a way that Red Line's advantages over RT6 are relevant to you, it's operating outside the optimal range. The problem, especially in the turbo EJ, is there's very little value priced HD 30 grade oil. GC is a long time favorite, and works well for most users, but it's only available at a couple stores in expensive quarts. The latest Low-SAPS HD 30 grade oils perform really well at short(ish) intervals, but cost close to double what RT6 does. So even though RT6 is a bit thicker than optimal for most users, the penalties are slim and the value proposition is excellent. Same goes for all oils in RT6's category; M1 TDT, Chevron Delo, and the Schaeffer's 9000 Big-E mentions as long as it's convenient and cheap to acquire. As to the Schaeffer's 9000, it looks to have excellent specs including API SM and ACEA E7 and E9 both. The HTHS is maybe a bit overkill for most Subarus at 4.05, but it's not going to hurt anything but your fuel economy (a teeny weeny bit). The TBN is slightly low compared to others in the category, but it may have newer chemistry which allows long drain intervals none-the-less. Post the results! The list of oils in the guide is already approaching unmanageable, so I decided to stick to oils commonly available or interesting for other reasons. |
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04-21-2015, 11:01 AM | #37 |
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Can i ask something why did u say that the ej turbo engine was the most problematic are you saying the engines are bad? Or are u saying that engine is inevitable to spin bearings? Im just a little confused if i was to use rt6 from now on on my vehicle would it help with that issue but still happen eventually to the bearings could you just maybe elaborate a little bit more as to what you meant by that please
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04-21-2015, 07:42 PM | #38 | |
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IM...just...incredulous, here |
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04-22-2015, 01:09 AM | #39 |
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Let's be real though, if you have to ask why someone says EJ engines have problems...
They haven't read any other thread on here. Google is your friend. |
04-22-2015, 05:38 PM | #40 |
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So are you telling me that using 5W-30 isn't good for the EJ turbo engines??????
Anybody else use have issues using 5W-30 on the EJ engines? I've been using Mobil 1 5W-30 full synthetic since 42,000 miles. Just switched over to Castrol Edge on the current oil change. About to hit 60k. Should I stick to 5W-30 or no? I don't track the car or anything. Just normal street driving. |
04-22-2015, 05:41 PM | #41 |
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Noo jettylife ive seen and hear of all ej problems ok im saying is he saying they are just poor engines in general cause theres a huge debate on that topic and the 2006 forester xt got engine of the year award in 2006
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04-22-2015, 06:25 PM | #42 |
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Phenomenal write up. *Standing ovation*
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04-23-2015, 07:42 AM | #43 | |
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Quote:
Forget brand, it does not matter. The point of this information is help you choose the proper viscosity for your application. And not just the number on the bottle, but the kinematic viscosity at 100C and the High Temp High Shear viscosity. Resource Conserving GF5 5W30 oils are designed to shear for better fuel economy. Your Mobil1 5W30 and your Castrol Edge (unless you're in Oz or Europe running ACEA A3 Edge) will most likely shear to a 20 grade oil in less than 3k miles. |
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04-23-2015, 08:50 AM | #44 |
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Where would Rotella T5 15w40 fall into the mix? Off Shell`s site it meets the API SM rating.
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04-23-2015, 12:20 PM | #45 | |
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Quote:
Why don't you look up the specs for RT5 15w40 and read the selection guide and posit a category and usage scenario for it? All the info is in the first 12 posts of this thread along with the Rotella website. Some things to think about: What does the SAE grade say about the cold-start characteristics? What is the cost? Do answers to the above two questions indicate why it might not be on my short list of good oils to use in a Subaru? |
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04-23-2015, 04:57 PM | #46 | |
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This is my take: T5 falls in the heavy duty category It's cheap. API SM ACEA E9 HT/HS 5.6 Bugeye wrx Vf 22 turbo with basic supporting mods. Daily driver use occasional spirited driving Should meet my cold weather cold start requirements in SoCal It's seems to look good but I am not confident I am interpreting the specs correctly to meet requirements of protection. |
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04-23-2015, 05:02 PM | #47 | |
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04-23-2015, 05:32 PM | #48 |
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This is a beater that I got fixed up. I use the good stuff T6 on my Sti but I am ok with a cheaper oil for this one if it meets minimum protection. Price point is more a factor because of some blow by.
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04-23-2015, 05:57 PM | #49 | |
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Quote:
RT5 15w40 will indeed serve your cold start needs fine in SoCal, but RT6 5w40 is only ~$1.25/qt more expensive and drastically better for cold starts, which is why it's mentioned specifically in the guide and 15w40 RT5 is not. Most of North America is colder than SoCal RT5 10w30 will also serve you well, but it's HT/HS is nowhere near 5.6, more like 3.6. |
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04-23-2015, 08:15 PM | #50 |
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If most of the country is running RT6... Why even worry about running RT5 15w40? It isn't that much more expensive, and it's proven in these cars.
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