Motor Oil 5W30 vs 0W40
+ Reply to Thread
Results 1 to 6 of 6

This is a discussion on Motor Oil 5W30 vs 0W40 within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; I have a 2015 WRX and want to use Mobil 1 0W40. The Subaru dealer states Subaru recommends 5W30, and ...

  1. #1
    Registered User
    Join Date
    Jan 2014
    Posts
    20

    Motor Oil 5W30 vs 0W40

    I have a 2015 WRX and want to use Mobil 1 0W40. The Subaru dealer states Subaru recommends 5W30, and that is their position. With the hot summer weather, and using the air conditioning, I think 5W30 is marginal. Any thoughts?

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User tesla317's Avatar
    Join Date
    Aug 2012
    Posts
    293
    Where do you live? My manual for my 2010 wrx states that in high heat areas that a different viscosity is recommend.

  4. #3
    Registered User
    Join Date
    Jan 2011
    Location
    Western NY
    Posts
    226
    I'd stick with 5w-30 while you are within warranty then you can use whatever you want.
    5-30 has been fine for the 14 FXT guys including mine.

    Sent from my GT-N5110 using Tapatalk

  5. #4
    Registered User
    Join Date
    Jan 2014
    Posts
    20
    Quote Originally Posted by tesla317 View Post
    Where do you live? My manual for my 2010 wrx states that in high heat areas that a different viscosity is recommend.
    Connecticut ...

  6. #5
    Registered User ajaxthecleaner25's Avatar
    Join Date
    May 2014
    Location
    Freehold
    Posts
    100
    Is there any real benefit to running Mobile-1 5w30 or say Motul 8100 5w30 versus Subaru oil? My mechanic said I should just stick to Subaru oil.

    I know you should for sure stay with a Subaru oil filter.
    2015 Limited WRX on order . . . JUST GET HERE ALREADY!

  7. #6
    Village Idiot McBill's Avatar
    Join Date
    Sep 2013
    Location
    Buckeye State
    Posts
    1,528
    I Support ClubWRX
    First off, I would stick to whatever oil the manual/Subaru recommends while you are under warranty. Second off, even with the amount of heat you think you will be experiencing I don't think it is nearly enough to justify going with 0w40. If I remember correctly, Subaru recommends the 5w30 in outside temperatures of well above what we see in the hottest parts of the united states.
    2011 WRB WRX Sedan - Q300, Invidia Catted Downpipe, Cobb RAM Intake w/Box, Tuned buy Turn in Concepts
    Stink-Eye Mob #696
    Build Thread
    Facebook
    @billym14

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself. We strongly suggest that you stay away from using aol, yahoo, msn, and hotmail accounts. Sometimes the mail server blocks the emails from our server. As a result you will not receive any notifications including the confirmation email.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •