Welcome to the North American Subaru Impreza Owners Club Monday April 21, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
New England Subaru Impreza Club
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Chapters > New England Impreza Club Forum -- NESIC

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-16-2002, 12:05 PM   #1
rxed
Scooby Newbie
 
Member#: 19725
Join Date: Jun 2002
Vehicle:
02 wrx
silver

Default pls suggest wht synthetic oil to use for WRX

tomorrow I am taking my wrx for its 10000 miles oil change. read somewhere its better to use the synthetic oil as opposed to non-synthetic. wht is the best oil to use???

thnks
* Registered users of the site do not see these ads.
rxed is offline   Reply With Quote
Old 07-16-2002, 12:15 PM   #2
Slvrblt
Scooby Guru
 
Member#: 4811
Join Date: Mar 2001
Chapter/Region: NESIC
Location: Warper of Young Minds
Vehicle:
2014 Focus ST
NESIC track Ho #35

Default

there are differing opinions when it comes to what synth to use and even when to use it. I've read that switching to synthetic will end up leading to more oil use overall if done prematurely. I didn't switch to synthetic till around 10k, others did right off

I use 5w30 Mobil 1 now and 10w30 in the winter(though I haven't gotten that far yet)

others have used AMSoil and Redline

speed safely

Brian
Slvrblt is offline   Reply With Quote
Old 07-16-2002, 12:25 PM   #3
rkkwan
Scooby Specialist
 
Member#: 5596
Join Date: Apr 2001
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
2010 Honda Fit Sport
Black

Default

Many of us use Mobil 1, as it's full-synthetic and not too expensive (about $3.5/qt). Red Line, etc may cost up to $8/qt. Synthetics are better than regular oil as it's much more consistent in its structure, and don't break down as easily in hard conditions (like on a race track) as regular oil.

-Ray
rkkwan is offline   Reply With Quote
Old 07-16-2002, 12:42 PM   #4
lenyx
Scooby Specialist
 
Member#: 8221
Join Date: Jul 2001
Chapter/Region: NESIC
Location: Belchertown, MA
Vehicle:
2011 Legacy 2.5i Ltd

Default

I use Royal Purple.. honestly it's probably not going to matter which synthetic you use as most don't drive the car to the synth's full potential.

But you know.. purple oil.. it's kinda fun.
lenyx is offline   Reply With Quote
Old 07-16-2002, 04:10 PM   #5
subarurabbit
Scooby Guru
 
Member#: 4083
Join Date: Feb 2001
Chapter/Region: NESIC
Location: Reading, MA
Vehicle:
2006 OBS SE
regal blue

Default

I'm going with Amsoil 5w-30 with 11.25k mile intervals.
subarurabbit is offline   Reply With Quote
Old 07-16-2002, 06:34 PM   #6
Wheels
Scooby Specialist
 
Member#: 5410
Join Date: Apr 2001
Location: Stillwater, NY
Vehicle:
2008 BMW 335XI
Black

Default

Quote:
Originally posted by subarurabbit
I'm going with Amsoil 5w-30 with 11.25k mile intervals.


dam!
Wheels is offline   Reply With Quote
Old 07-16-2002, 06:43 PM   #7
DustinR
Scooby Specialist
 
Member#: 8264
Join Date: Jul 2001
Chapter/Region: NESIC
Location: Burlington, VT
Vehicle:
2001 Impreza 2.5 RS
95 Impreza 1.8 Coupe

Default

Quote:
Originally posted by subarurabbit
I'm going with Amsoil 5w-30 with 11.25k mile intervals.
damn...... remind me never to buy a car from you
DustinR is offline   Reply With Quote
Old 07-16-2002, 07:10 PM   #8
SubEd
Scooby Guru
 
Member#: 717
Join Date: Jan 2000
Chapter/Region: NESIC
Default

I'll add a to the pile.
SubEd is offline   Reply With Quote
Old 07-16-2002, 07:35 PM   #9
Wheels
Scooby Specialist
 
Member#: 5410
Join Date: Apr 2001
Location: Stillwater, NY
Vehicle:
2008 BMW 335XI
Black

Default

Scrouge!

I thought I used to be bad going 7,500 now dropped to 5k

Hey man I have some used paper plates want um?
Wheels is offline   Reply With Quote
Old 07-16-2002, 07:58 PM   #10
Altered BeasT
Scooby Newbie
 
Member#: 10062
Join Date: Sep 2001
Location: Boston/Cape area
Vehicle:
2002 Ford Explorer
Eddie Bauer-White

Default

That's what Amsoil is designed for. The 2 things to happen with oil to hurt your engine is:
1)The oils properties break down or change due to heat/friction.
2)Contamination... dirt, small engine particles..

You need a good filter. The Amsoil filter filters 5-15 Microns and to compare to a Mobil1 filter is 10-20. Also, the Amsoil filter held 20 grams of contaminents which is twice the same FRAM that were compared and 25% more than the AC filters which both are probably better than most stock OEM filters.
So, if you change the filter regularly and it's filtering well, contamination isn't a problem.
Now with break down, Amsoil is made to go 25K miles in many NA engines before breakdown occurs. You can send in a teaspoon sample for their lab testing to tell you it's consistancy and life expectancy. His going 10K+ miles with it isn't uncommon anymore. Of course there will always be people used to non synthetic oil and will never comprehend going more than 3K. They need to wake up to what technology can do. As for myself, I always ran Amsoil in my 300ZX Twin Turbos. I changed it about every 4-6K miles and raced it a lot. My black Z pushed a mid 400 at the crank. I sold it with 90K raced miles running great. With the WRX I've been using Mobil1 every 3K so far just because I'm not on the West coast with my Amsoil hook up.
BTW, Amsoil GUARANTEES if you follow their specs and directions that it will not couse engine problems and will go head to head with any dealer attempting to say anything of the sort.
How to I know? I began researching them in 96 and have read everything from their lawsuites to their lab tests and will tell you they are legit.
If he's running a turbo car then he should change his filter every 6K miles. A non turbo should change it at least every 12K miles. Many people are happy with Royal Purple, but I haven't seen it in too many independent tests... My favs are Amsoil and Mobil1, Redline if it's all you can find.

You need to look up the specs yourself.
As an example:
Amsoil vs Royal Purple:

Viscometrics 40 degrees C cSt
- The lower the number, the better because it means better flow at low temperatures. This is important for the many in colder climates:
Amsoil Series 2000 0W-30.....57.9

Royal Purple 5W-30...........62.5
Amsoil XL-7500 5W-30.........58.4
Amsoil 5W-30.................59.5

Royal Purple 10W-30..........61.8
Royal Purple 10W-30..........67.3
Amsoil XL7500 10W-30.........64.0
Amsoil 10W-30................64.3

Royal Purple 10W-40..........94.0
Amsoil 10W-40................79.2


Viscosity Index
- The higher the number, the less change due to temperature.

Amsoil Series 2000 0W-30......188

Royal Purple 5W-30............160
Amsoil XL-7500 5W-30..........160
Amsoil 5W-30..................197

Royal Purple 10W-30...........144
Royal Purple 10W-30...........149
Amsoil XL7500 10W-30..........148
Amsoil 10W-30.................177

Royal Purple 10W-40...........149
Amsoil 10W-40.................183


Pour Point
- Again for those of you in colder climates. This is the temp that the oil will still pour at.

Amsoil Series 2000 0W-30.....<-76

Royal Purple 5W-30............-44
Amsoil XL-7500 5W-30..........-60
Amsoil 5W-30..................-60

Royal Purple 10W-30...........-40
Royal Purple 10W-30...........-49
Amsoil XL7500 10W-30..........-54
Amsoil 10W-30.................-60

Royal Purple 10W-40...........-49
Amsoil 10W-40.................-54



Flash Point
- The higher, the better able to withstand high temperature. This and the next one are important, especially with the heat our turbos put out, or if
going to the track and running hot.

Amsoil Series 2000 0W-30......460

Royal Purple 5W-30............395
Amsoil XL-7500 5W-30..........464
Amsoil 5W-30..................442

Royal Purple 10W-30...........400
Royal Purple 10W-30...........400
Amsoil XL7500 10W-30..........471
Amsoil 10W-30.................446

Royal Purple 10W-40...........400
Amsoil 10W-40.................450


Fire Point

Amsoil Series 2000 0W-30......489

Royal Purple 5W-30............435
Amsoil XL-7500 5W-30..........478
Amsoil 5W-30..................442

Royal Purple 10W-30...........435
Royal Purple 10W-30...........445
Amsoil XL7500 10W-30..........478
Amsoil 10W-30................. ?

Royal Purple 10W-40...........435
Amsoil 10W-40.................450


Total Base Number (TBN)
- This is basically the additive package that keeps the oil alive. The higher the number the better. Most of these numbers for Amsoil are the
minimum they allow, usually the numbers I've seen are between 12 and 13!

Amsoil Series 2000 0W-30.....11.4

Royal Purple 5W-30...........10.5
Amsoil XL-7500 5W-30..........9.0
Amsoil 5W-30................>11.0

Royal Purple 10W-30..........10.5
Royal Purple 10W-30..........10.5
Amsoil XL7500 10W-30..........9.0
Amsoil 10W-30...............>11.0

Royal Purple 10W-40..........13.0
Amsoil 10W-40...............>12.0


In most cases the Amsoil beats the RP numbers, even their lowest line, the
XL-7500, which I've been told is pretty comparable to Mobil 1. I understand that Mobil 1's TBN numbers are around 9 as well.
Altered BeasT is offline   Reply With Quote
Old 07-16-2002, 08:36 PM   #11
Wheels
Scooby Specialist
 
Member#: 5410
Join Date: Apr 2001
Location: Stillwater, NY
Vehicle:
2008 BMW 335XI
Black

Default

Quote:
Originally posted by Altered BeasT
You need a good filter. The Amsoil filter filters 5-15 Microns and to compare to a Mobil1 filter is 10-20. Also, the Amsoil filter held 20 grams of contaminents which is twice the same FRAM that were compared and 25% more than the AC filters which both are probably better than most stock OEM filters.
So, if you change the filter regularly and it's filtering well, contamination isn't a problem.
Now with break down,
So another word your saying change the filter but leave the engine oil?

Umm..

And if you dont change the filter how many times will that filter allow oil through when its collecting crap? And how much wear on your oil pump is it causeing trying to push/pull the oil through such small holes?

They cant win that in court! Engine seized do to a restrictive oil filter. Which caused the engine oil pump to run under pressure for so long!
Wheels is offline   Reply With Quote
Old 07-16-2002, 09:12 PM   #12
subarurabbit
Scooby Guru
 
Member#: 4083
Join Date: Feb 2001
Chapter/Region: NESIC
Location: Reading, MA
Vehicle:
2006 OBS SE
regal blue

Default

I've gone 25k with my 90-94 1st generation 2.2 n/a legacies with an Amsoil filter change at half way point with no illl effects - even though they had 100k miles on them before the conversion. I did use their engine flush.

Now as for the WRX, Amsoil's recommendation is 3x manufacturer's recommendations on 5w30 oil with a turbo car. Subaru says 7500, dealers say between 3000 & 3750. 3x 3750 = 11, 250 which is less then 12,500 miles, which is the life of an Amsoil oil filter. Amsoil recommends 7500 miles for their premium 10w30 product on turbo cars.
subarurabbit is offline   Reply With Quote
Old 07-16-2002, 09:25 PM   #13
Wheels
Scooby Specialist
 
Member#: 5410
Join Date: Apr 2001
Location: Stillwater, NY
Vehicle:
2008 BMW 335XI
Black

Default

Cool well hope the engine keeps ticking. How do you account for my performance drop around 6,000 miles?
Wheels is offline   Reply With Quote
Old 07-16-2002, 09:43 PM   #14
Altered BeasT
Scooby Newbie
 
Member#: 10062
Join Date: Sep 2001
Location: Boston/Cape area
Vehicle:
2002 Ford Explorer
Eddie Bauer-White

Default

Quote:
Originally posted by Wheels


So another word your saying change the filter but leave the engine oil?

Umm..

And if you dont change the filter how many times will that filter allow oil through when its collecting crap? And how much wear on your oil pump is it causeing trying to push/pull the oil through such small holes?

They cant win that in court! Engine seized do to a restrictive oil filter. Which caused the engine oil pump to run under pressure for so long!
If you're interested, research it. Also, email them. They will gladly share any information. If you're not interested I'm not here to debate. It's a completely different design of the filter and was a question I also raised and researched. I carefully monitored my pressure in and out on my Z wondering the same and results showed no real difference. Don't forget, the synthetic flows much better than conventional oil. Compare a conventional oil to the list I made, you'll see that you can use a thinner oil without the worry of breakdown because of it's stats against heat. That alone flows more free through the filter... along with a superior design and use of elements the end result you'll probably find is less restrictive flow vs stock. What it comes down to is it's clear the lubrication and lifespan of the oil is far superior in synthetics, especially Amsoil. If you're a scared then change it whenever you want and use whatever filter you want, you're still going to get the benefits and peace of mind (as old fashoned dinosaur oil centered as it may be =).
Just trying to help note the last part of your post was a blind jump to a conclusion. Taking into account the size of these "holes" you're basing... your guess on would be done much better if you figured filter element surface area and the element itself, along with the viscosity of the oil able to be used in each case.

See how many people you can find that followed specifications and the dealer dared blame Amsoil. Then of those people and their probably ignorant dealers... find out how many of them Amsoil didn't set them straight immediatly. They are very prepared for cases like these and I've read the letters they send the dealership.
I'm for real that if you're interested to email them with any questions because I have done so many times and have received very in depth responses to aid.

As for now, enjoy your oil changes I know I do
Altered BeasT is offline   Reply With Quote
Old 07-16-2002, 09:46 PM   #15
Altered BeasT
Scooby Newbie
 
Member#: 10062
Join Date: Sep 2001
Location: Boston/Cape area
Vehicle:
2002 Ford Explorer
Eddie Bauer-White

Default

Quote:
Originally posted by Wheels
Cool well hope the engine keeps ticking. How do you account for my performance drop around 6,000 miles?
You're asking for someone else to account for your performance loss? Sounds like something you should do!
Altered BeasT is offline   Reply With Quote
Old 07-16-2002, 10:04 PM   #16
Wheels
Scooby Specialist
 
Member#: 5410
Join Date: Apr 2001
Location: Stillwater, NY
Vehicle:
2008 BMW 335XI
Black

Default

Quote:
Originally posted by Altered BeasT


You're asking for someone else to account for your performance loss? Sounds like something you should do!
wow do you get funnier as the night rolls on?
Wheels is offline   Reply With Quote
Old 07-16-2002, 10:16 PM   #17
Altered BeasT
Scooby Newbie
 
Member#: 10062
Join Date: Sep 2001
Location: Boston/Cape area
Vehicle:
2002 Ford Explorer
Eddie Bauer-White

Default

Quote:
Originally posted by Wheels


wow do you get funnier as the night rolls on?
I might with a few CM and Sprites. Here though, I was just saying you should check the performance loss yourself. The smiley face was to try and keep you from acting like I see many board members act when good points are brought up that don't support their comments. No reason to drag any legit topics off anywhere other then where they were intended by the original.
Altered BeasT is offline   Reply With Quote
Old 07-16-2002, 10:38 PM   #18
rxed
Scooby Newbie
 
Member#: 19725
Join Date: Jun 2002
Vehicle:
02 wrx
silver

Default follow up

thanks for confusing me to death. will less than 12 hrs left for the oil change I am no wiser......
rxed is offline   Reply With Quote
Old 07-16-2002, 10:46 PM   #19
Wheels
Scooby Specialist
 
Member#: 5410
Join Date: Apr 2001
Location: Stillwater, NY
Vehicle:
2008 BMW 335XI
Black

Default

Slap some valvoline in and a purlator filter last ya 5k no problem.
Wheels is offline   Reply With Quote
Old 07-16-2002, 10:48 PM   #20
Slvrblt
Scooby Guru
 
Member#: 4811
Join Date: Mar 2001
Chapter/Region: NESIC
Location: Warper of Young Minds
Vehicle:
2014 Focus ST
NESIC track Ho #35

Default Re: follow up

Quote:
Originally posted by rxed
thanks for confusing me to death. will less than 12 hrs left for the oil change I am no wiser......
basically, like almost everything else that's car related- there is no perfect answer. go with what you would like, able to get, etc

speed safely

Brian
Slvrblt is offline   Reply With Quote
Old 07-16-2002, 10:58 PM   #21
rkkwan
Scooby Specialist
 
Member#: 5596
Join Date: Apr 2001
Chapter/Region: TXIC
Location: Houston, TX
Vehicle:
2010 Honda Fit Sport
Black

Default

How about this - If you don't race your car or abuse the engine, I'd suggest:

Mobil 1 or Royal Purple; change oil and filter according to service manual, i.e. every 7500 miles.

I don't think anybody can object to this!!!

If you race your car or abuse your engine, then adjust schedule, or switch to Amsoil or Red Line. Do some research, and tell us how/when/why/what...

BTW, shouldn't service occur at 3,000 miles, then 7500, and then every 7500 after?

-Ray

Last edited by rkkwan; 07-16-2002 at 11:06 PM.
rkkwan is offline   Reply With Quote
Old 07-17-2002, 12:57 AM   #22
DustinR
Scooby Specialist
 
Member#: 8264
Join Date: Jul 2001
Chapter/Region: NESIC
Location: Burlington, VT
Vehicle:
2001 Impreza 2.5 RS
95 Impreza 1.8 Coupe

Default

Maybe i am being really old fassion by changing my oil ever 4k. Maybe technology has come a long way and the oil can work to 11k. All i know is oil is cheap and when i take it out its dirty. Dirty oil is not good for the car... I it makes me feel better and costs very little. Changing your oil early never hurts changing it late always dose. You be the judge.

-Dustin
DustinR is offline   Reply With Quote
Old 07-17-2002, 01:17 AM   #23
xstar
Scooby Specialist
 
Member#: 10821
Join Date: Oct 2001
Chapter/Region: NESIC
Vehicle:
2008 WRB STi

Default

haha, posting from Thailand. It's not that hot out yet...

I use Redline 10W40. I guess I drive my wrx hard... After an oil change at 4500 miles from last oil change, with Redline synth oil in the engine already, the car feels much more fluid! The car bogs less during deceleration. I guess I'll keep my oil change intervals at 3k.

Odd, no subarus in sight here. Lots of Corollas tho.
xstar is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Which synthetic oil to use? Jay04WRX Transmission (AT/MT) & Driveline 16 04-30-2007 01:21 PM
What oil to use for 120 deg weather? sky69lark Service & Maintenance 6 07-28-2005 02:41 PM
what gear oil to use for STI RA gear sets bottlediger Transmission (AT/MT) & Driveline 1 11-07-2004 03:22 PM
What Rear Diff oil to use for STi? root Service & Maintenance 8 06-30-2004 10:34 AM
What oil to use for STi ? asceleon Factory 2.5L Turbo Powertrain 82 12-18-2003 11:33 AM


All times are GMT -4. The time now is 02:31 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.