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Old 01-18-2007, 02:25 PM   #1
garboplateNY88
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Post Amsoil or Royal Purple

which one is better
5w-30 or 10w-30 syn oil.
is K@N oil filter is one of best for subaru's
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Last edited by garboplateNY88; 01-19-2007 at 12:43 PM.
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Old 01-18-2007, 02:44 PM   #2
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Amsoil. No contest. The last three used oil analysis that I've seen posted here showed RP 10W30 shearing to a 20 weight. In one case it was in about 1,200 miles. Conventional wisdom says that the 10W30 is thicker at operating temps., but this is not always the case. Where do you live? What does the owner's manual say for your temps?

People say paper filters best but when I have the oil analysed on my FXT (OEM air filter) and my wife's OB (K&N panel), the OB always shows less dirt getting past the air filter. Maybe it's because the OB is sealed better, or because I drive in dirter places. I don't know.


-Dennis
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Old 01-18-2007, 03:03 PM   #3
WRXINTX
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I SECOND THAT ON THE AMSOIL!!!! IT IS PROBABLY THE BEST OIL OUT THERE....

GET AN SAE RATED SL oil NO MATTER WHAT YOU DO AND WHATEVER BRAND YOU BUY!!!!

It will decrease wear on the tappets and cams and protect the engine at higher loads!!

RYNO
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Old 01-18-2007, 03:08 PM   #4
WRXINTX
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https://www.amsoil.com/storefront/xlm.aspx

also, if you are in NY.....

cold flow is important!!!

haha... like you didn't know
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Old 01-18-2007, 03:42 PM   #5
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I too think AmsOil is the best but I use 0w30 in the winter and 5w30 in the summer.
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Old 01-18-2007, 04:19 PM   #6
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Go with the AMSOIL Series 2000 0w-30 and the EaO12 oil filter and you will be set year round.

0w-30 = https://www.amsoil.com/storefront/tso.aspx?zo=1132530
5w-30 = https://www.amsoil.com/storefront/asl.aspx?zo=1132530
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Old 01-18-2007, 10:10 PM   #7
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I have burning oil in my legacy and my 05 STI. In my legacy I use valvoline 5w-30 with mobil 1 filter and I just lost 2 quarts that's why I am switching to royal purple syn. Should I use 5w-30 or 10w-30. what would burn less oil.
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Old 01-18-2007, 10:20 PM   #8
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Quote:
Originally Posted by garboplateNY88 View Post
I have burning oil in my legacy and my 05 STI. In my legacy I use valvoline 5w-30 with mobil 1 filter and I just lost 2 quarts that's why I am switching to royal purple syn. Should I use 5w-30 or 10w-30. what would burn less oil.
Switching to RP will have little effect on using oil. You need to change viscosity. If you're insistent on trying RP and want to stop usage, go with their 10W40.
RP 10W30 UOA http://forums.nasioc.com/forums/show...referrerid=767
And another http://forums.nasioc.com/forums/show...referrerid=767

Basically you do not want an 30 weight energy conserving oil.

-Dennis

Last edited by bluesubie; 01-18-2007 at 10:26 PM.
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Old 01-18-2007, 10:39 PM   #9
AllWheelsDriven
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i was burning oil at 5w30 using royal purple,M1 etc. i switched to redline 10w40 and havent burned any yet in 2300 miles.
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Old 01-18-2007, 10:47 PM   #10
garboplateNY88
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What is the best site and cheapest site for buying Amsoil syn oil and what grade should I use if I decide to buy this oil. Oil that doesn't burn easy.
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Old 01-19-2007, 12:17 AM   #11
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Talking Fyi

garboplateNY88:

The best & cheapest way to buy Amsoil @ a discount is to become a preferred customer ($20 yr) & purchase via their website. Call Technical Support & they can answer your questions pertaining what oil is best for your vehicle 715-392-7101.

Regards,
~Button
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Old 01-19-2007, 12:54 AM   #12
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royal purple 10-30
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Old 01-19-2007, 01:26 AM   #13
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I would use Amsoil, the viscosity depends on if you have any oil useage. I run Amsoils 0w30. I would not use a K&N air filter...Yeah they flow really well but do a crappy job filtering dirt. I would use a Amsoil Ea air filter or an OEM air filter. I just installed a SPT intake and when the filter needs replaced I will change it to an Amsoil Ea filter if Amsoils has one that fits.

Last edited by 06grayrex; 01-19-2007 at 01:33 AM.
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Old 01-19-2007, 09:01 AM   #14
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I use Amsoil 10W-30 year round in my XT. Has never used a drop of oil. I read somewhere that Royal Purple has moly in it. Not something I want in my engine.
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Old 01-19-2007, 10:38 AM   #15
garboplateNY88
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Quote:
Originally Posted by 06grayrex View Post
I would use Amsoil, the viscosity depends on if you have any oil useage. I run Amsoils 0w30. I would not use a K&N air filter...Yeah they flow really well but do a crappy job filtering dirt. I would use a Amsoil Ea air filter or an OEM air filter. I just installed a SPT intake and when the filter needs replaced I will change it to an Amsoil Ea filter if Amsoils has one that fits.
I meant oil filter not air filter

Last edited by garboplateNY88; 01-19-2007 at 10:53 AM.
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Old 01-19-2007, 01:06 PM   #16
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ive been using the amsoil 0w-30 for a couple years now, if u become a preferred customer for like 10 bucks every six months u can get a pretty good discount.
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Old 01-19-2007, 02:53 PM   #17
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Quote:
Originally Posted by Corkfish View Post
I read somewhere that Royal Purple has moly in it. Not something I want in my engine.
it is on amsoil's website. I used mobil 1 on my wrx, but it would burn about half a quart every 3k, switced to amsoil, burned a bit less oil, then tried royal purple, oil consumption was barely noticeable and gas mileage went up. That is all i have used in the Sti. Not saying amsoil is bad, just think royal is better.
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Old 01-19-2007, 02:53 PM   #18
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Quote:
Originally Posted by Corkfish View Post
I read somewhere that Royal Purple has moly in it. Not something I want in my engine.
Moly is a good thing. Your pistons are coated with it. Actually, clicking on the RP UOA's above, RP doesn't have much. Redline has tons and Havoline conventional oil has a lot as well.

-Dennis

Last edited by bluesubie; 01-19-2007 at 03:04 PM.
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Old 01-19-2007, 02:55 PM   #19
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Quote:
Originally Posted by norexyet View Post
Not saying amsoil is bad, just think royal is better.
Check some used oil analyses and get back to me. RP 10W30 is their best 20 weight. Just check the UOA's I posted above.

Quote:
Amsoil syn oil and what grade should I use if I decide to buy this oil. Oil that doesn't burn easy.
Look for a viscosity that meets European ACEA A3 specs. Even if you look at a 30 weight, an oil that meets ACEA A3 specs are thicker and more stable than oils that don't.

-Dennis

Last edited by bluesubie; 01-19-2007 at 03:06 PM.
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Old 01-19-2007, 02:58 PM   #20
norexyet
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Quote:
Originally Posted by bluesubie View Post
Check some used oil analyses and get back to me. RP 10W30 is their best 20 weight.

-Dennis
yea we use royal in all of our built motors and customer cars without oil consumption or any other issues, must be no good.
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Old 01-19-2007, 03:10 PM   #21
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Quote:
Originally Posted by norexyet View Post
yea we use royal in all of our built motors and customer cars without oil consumption or any other issues, must be no good.
I didn't say it wasn't any good and I'm not disputing that you do not have consumption issues. It's just not worth the hype, IMHO, and there is a lot of evidence to back this up.

Would I want to use oil in an STi or LGT that easily shears to a 20 weight? No. It's not my opinion that RP 30 weights shear easily, it's a fact. It's probably fine though since I'm positive there are thousands of people driving around with 20 weights in the 400 hp STi's.

-Dennis
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Old 01-19-2007, 03:58 PM   #22
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Quote:
Originally Posted by bluesubie View Post
Moly is a good thing. Your pistons are coated with it. Actually, clicking on the RP UOA's above, RP doesn't have much. Redline has tons and Havoline conventional oil has a lot as well.

-Dennis

Then why would Cummins ban using any moly products in its engines because of excessive valave train wear?
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Old 01-19-2007, 10:40 PM   #23
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Quote:
Originally Posted by garboplateNY88 View Post
I meant oil filter not air filter
Sorry I'm Blind and deaf
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Old 01-20-2007, 02:20 PM   #24
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after i read this, i searched more about it. came out, AMSOIL and Royal Purple is top of the line. however, its been proven that AMSOIL came out little better than RP.

btw: is it AMS-OIL or AMSOIL read together.
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Old 01-20-2007, 03:18 PM   #25
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