RX8Club.com
Register Photo Gallery FAQ Members List Calendar Search Today's Posts Mark Forums Read RX8 Live!Used CarsVendor Directory

Go Back   RX8Club.com > Series I Tech & Performance > Series I Tech Garage
Sign in using an external account
Register Forgot Password?

Welcome to RX8Club.com!
Welcome to RX8Club.com,

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, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join RX8Club.com today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Rate Thread Display Modes
Old 09-22-2010, 10:43 AM   #1
Registered User
 
Trader Score: (0)
Join Date: Sep 2010
Location: Sri Lanka
Posts: 25
Castrol Magnatec or Mobil for Rx8

Hi guys

got the 2004 Rx8 46,000 km, switched to castrol maganatec 10W-40. In sri Lanka temp range-28C-35C. or shall i use mobile 15W-40 mineral. Pls advice. Thanks a million
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on RX8Club.com!
lalinka is offline   Reply With Quote
Old 09-22-2010, 10:48 AM   #2
Registered
 
jasonrxeight's Avatar
 
Trader Score: (0)
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,374
none
get some Castrol GTX 5w20
__________________
09+ Racing Beat oil cooler screen install

2009 Mazda RX-8 R3
2013 Toyota FJ Cruiser
2014 Ducati Monster 696
jasonrxeight is offline   Reply With Quote
Old 09-22-2010, 10:58 AM   #3
Registered User
 
Trader Score: (0)
Join Date: Sep 2010
Location: Sri Lanka
Posts: 25
castrol gtx 5W-20 is not available here and the mechanics told me since their is no winter in sri lanka 5w is not avialable.
lalinka is offline   Reply With Quote
Old 09-22-2010, 11:10 AM   #4
Registered
 
jasonrxeight's Avatar
 
Trader Score: (0)
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,374
Quote:
Originally Posted by lalinka View Post
castrol gtx 5W-20 is not available here and the mechanics told me since their is no winter in sri lanka 5w is not avialable.
do you have other GTX?
__________________
09+ Racing Beat oil cooler screen install

2009 Mazda RX-8 R3
2013 Toyota FJ Cruiser
2014 Ducati Monster 696
jasonrxeight is offline   Reply With Quote
Old 09-22-2010, 11:12 AM   #5
Not in NYC, again :)
 
nycgps's Avatar
 
Trader Score: (1)
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,509
no offense here but it's just pure stupid to use 5w20 for Renesis (or any Rotary engine) other than you want to squeeze that last 5% of mpg out of it.

it will work of course, you can even use 0w10 from Mobil, but is it a good thing to do? take a guess.

Use the 15w40 one, the closer the viscosity, the less "extra additive" it has, meaning less crap to wear out = more stable oil.

Even better , just use 20w50. Cuz your location will NEVER see snow or any temp close to it. (unless its the end of the world )
__________________
ロータリーエンジン
nycgps is offline   Reply With Quote
Old 09-22-2010, 11:20 AM   #6
Registered User
 
Trader Score: (0)
Join Date: Sep 2010
Location: Sri Lanka
Posts: 25
got other gtx oils and @ nycgps- point taken into consideration. thanks dude- haha but wishing to see snow in a tropical island
lalinka is offline   Reply With Quote
Old 09-22-2010, 11:20 AM   #7
the giant tastetickles
 
yiksing's Avatar
 
Trader Score: (0)
Join Date: Sep 2005
Location: in the basement
Posts: 2,760
^^Agree, where I live, its the same temperature range, been using 20w-50 since day 1. Just make sure to do oil change every 5000 km and you will be fine for normal daily driving with once in a while redline.
__________________
yiksing is offline   Reply With Quote
Old 09-22-2010, 11:25 AM   #8
Registered
 
jasonrxeight's Avatar
 
Trader Score: (0)
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,374
Quote:
Originally Posted by nycgps View Post
no offense here but it's just pure stupid to use 5w20 for Renesis (or any Rotary engine) other than you want to squeeze that last 5% of mpg out of it.

it will work of course, you can even use 0w10 from Mobil, but is it a good thing to do? take a guess.

Use the 15w40 one, the closer the viscosity, the less "extra additive" it has, meaning less crap to wear out = more stable oil.

Even better , just use 20w50. Cuz your location will NEVER see snow or any temp close to it. (unless its the end of the world )
pretty funny when you say its stupid to run 5W20 as if the main problem with most of the rotary failures are apex seals not sealing properly due to carbon build up coming off scratching the housing. a clean burn is much more important than wear protection. you go figure.
__________________
09+ Racing Beat oil cooler screen install

2009 Mazda RX-8 R3
2013 Toyota FJ Cruiser
2014 Ducati Monster 696
jasonrxeight is offline   Reply With Quote
Old 09-22-2010, 11:28 AM   #9
Not in NYC, again :)
 
nycgps's Avatar
 
Trader Score: (1)
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,509
Quote:
Originally Posted by jasonrxeight View Post
pretty funny when you say its stupid to run 5W20 as if the main problem with most of the rotary failures are apex seals not sealing properly due to carbon build up coming off scratching the housing. a clean burn is much more important than wear protection. you go figure.
even more funny is that you think 5w20 "burns cleaner" than say, 7w13423414

not to mention, MOST of the junk you see in the engine came from the gasoline you pump every few days.

Just because gasoline looks "golden pure" doesn't mean its really pure.

Do you know what will happen when your bearing is "out of spec" ? take another good guess.
__________________
ロータリーエンジン
nycgps is offline   Reply With Quote
Old 09-22-2010, 11:32 AM   #10
Registered
 
jasonrxeight's Avatar
 
Trader Score: (0)
Join Date: Jan 2010
Location: Omaha, NE
Posts: 3,374
Quote:
Originally Posted by nycgps View Post
even more funny is that you think 5w20 "burns cleaner" than say, 7w13423414

not to mention, MOST of the junk you see in the engine came from the gasoline you pump every few days.

Just because gasoline looks "golden pure" doesn't mean its really pure.

Do you know what will happen when your bearing is "out of spec" ? take another good guess.
if the junk inside the engine is from the gas, why some engines lasted 100k and some lasted 20k as if the deposit should be JUST from gas not oil.

Im running my 09 on 5w20, see how many engines I will be replacing according to your "theory".
__________________
09+ Racing Beat oil cooler screen install

2009 Mazda RX-8 R3
2013 Toyota FJ Cruiser
2014 Ducati Monster 696

Last edited by jasonrxeight; 09-22-2010 at 11:37 AM.
jasonrxeight is offline   Reply With Quote
Old 09-22-2010, 11:37 AM   #11
Not in NYC, again :)
 
nycgps's Avatar
 
Trader Score: (1)
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,509
Quote:
Originally Posted by jasonrxeight View Post
well lets see
Im running my 09 on 5w20, see how many engines I will be replacing according to your "theory".
I don't need to. I already know what will happen.

the only major difference is the 3rd injection port. which cover 3 points, both sides and center.

your apex seal will have more "even" wear because of it.

people premixing early will see the same effect.

but one thing to remember is that your bearing has not been changed, and we're using the same exact bearing since 12A. and that area needs a lot of love ... I mean lube to keep it from premature wear.

meh, what do I know ...
__________________
ロータリーエンジン

Last edited by nycgps; 09-22-2010 at 11:41 AM.
nycgps is offline   Reply With Quote
Old 09-22-2010, 11:40 AM   #12
Not in NYC, again :)
 
nycgps's Avatar
 
Trader Score: (1)
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,509
Quote:
Originally Posted by jasonrxeight View Post
if the junk inside the engine is from the gas, why some engines lasted 100k and some lasted 20k as if the deposit should be JUST from gas not oil.
that you have to ask wtf Mazda is doing at their factory.

Mazda "loosen" up the spec @ a lot of areas, Just read some spec of the MSP, compare it to say REW or DESI or whatever. u'll know what I mean.

Worst is that ... some of the seals inside these engines are "out of spec" from factory. they use pre-cut seals at factory to speed things up. I mean the engine will work. but for how long? good luck !

does this answer your question ?


Do a compression test hmm say when you reach 50K miles, it should tell you if you're one of the lucky ones or the "oh no" ones. I belong to the "oh no" group.

Custom re-build engines last much longer (most of the time, assume the person use a lot of brand new parts, or with completely new parts) will last longer than engines from Mazda. cuz in the US you can't buy pre-cut seals, all seals are a little long and you have to grind them down to the spec you like.

Im planning to do a complete brand new engine for my FC, already got the whole list of stuff that I need to buy , saved on Mazda's web site. The FC I have now has a Rebuild engine that the previous owner said the "previous" owner b4 him put in, has about 35K miles. sure it still works,but everytime I start it up it smokes like my car is on fire. garbage rebuild I would say.
__________________
ロータリーエンジン

Last edited by nycgps; 09-22-2010 at 12:02 PM.
nycgps is offline   Reply With Quote
Old 09-22-2010, 05:26 PM   #13
Lubricious
 
Nubo's Avatar
 
Trader Score: (0)
Join Date: Oct 2003
Location: SF Bay Area, California
Posts: 3,434
Quote:
Originally Posted by lalinka View Post
Hi guys

got the 2004 Rx8 46,000 km, switched to castrol maganatec 10W-40. In sri Lanka temp range-28C-35C. or shall i use mobile 15W-40 mineral. Pls advice. Thanks a million
What you're using will work fine. Don't worry about it.
Nubo is offline   Reply With Quote
Old 09-22-2010, 08:29 PM   #14
Wally Moderator
 
ken-x8's Avatar
 
Trader Score: (0)
Join Date: Aug 2006
Location: Northern Virginia
Posts: 4,765
Ditto. They're both fine. For that temperature range, almost any oil that a sane person would consider is OK. If I lived in your climate, my preference would be either of those two..as long as neither was synthetic.

Ken
__________________
2006 MT, Galaxy Gray
Sport Package
LightInSight
Fuel cap hook
EZ-Pass sock
ken-x8 is offline   Reply With Quote
Old 09-22-2010, 10:42 PM   #15
Mu ha.. ha...
 
Razz1's Avatar
 
Trader Score: (0)
Join Date: Aug 2004
Location: Cali
Posts: 14,259
I would use the Mobile One because it is heavier and lubricates better.
Razz1 is offline   Reply With Quote
Old 09-23-2010, 11:13 AM   #16
Registered User
 
Trader Score: (0)
Join Date: Sep 2010
Location: Sri Lanka
Posts: 25
hey guys,

Changed the oil from from castrol magnatec 15w-40 to Castrol GTX 20W-50. The cilmatic conditions around here is 30c degrees. had a major improvement. regained the power which was lost. engine runs and sounds smoother. this is the oil grade to be used for hot climates.

thanks
__________________
2004 Nissan Skyline 250GT
2004 Mazda RX 8- Black
[SIGPIC][/SIGPIC]
lalinka is offline   Reply With Quote
Old 09-23-2010, 04:52 PM   #17
Not in NYC, again :)
 
nycgps's Avatar
 
Trader Score: (1)
Join Date: Jun 2005
Location: Planet Earth
Posts: 19,509
keep it at that, and be happy revving
__________________
ロータリーエンジン
nycgps is offline   Reply With Quote
Old 09-23-2010, 06:03 PM   #18
Zoom Zoom Addict
 
Trader Score: (0)
Join Date: May 2010
Location: Texas Hill County
Posts: 456
Going back to the original post 10 weight is fine. If it's THAT COLD don't be driving a sports car.
VashGS is offline   Reply With Quote
Old 09-23-2010, 06:19 PM   #19
Mu ha.. ha...
 
Razz1's Avatar
 
Trader Score: (0)
Join Date: Aug 2004
Location: Cali
Posts: 14,259
WHY?

The RX8 is perfect! The cabin is nice and toasty!
__________________


Boy... am I beautiful!
Razz1 is offline   Reply With Quote
Old 09-23-2010, 06:19 PM
RX8Club
Mazda RX8




Paid Advertisement


 
 
 
Reply

Tags
2004, 5w20, build, castro, castrol, club, good, gtx, lalinkaliveca, lanka, magnatec, mazda, mobile, oil, rx, rx8, sae, sri

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Valvoline conventional, castrol edge or castrol gtx? GeoffJ RX-8 Discussion 20 09-23-2010 02:33 PM
another win for the castrol syntec rx8! kersh4w RX-8 Discussion 8 07-20-2008 10:17 PM
Castrol RX8 Drift Game staticlag RX-8 Media News 30 04-28-2008 07:22 PM
mobil 1 vs. castrol the lawsuit miater RX-8 Discussion 13 11-25-2005 07:31 AM


All times are GMT -5. The time now is 05:27 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO ©2011, Crawlability, Inc.
All content Copyright 2007 by Internet Brands, Inc.
Emails Backup