carmudgeons.com  

Go Back   carmudgeons.com > Automotive Forums > Technical Superiority

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 08-01-2018, 10:28 AM   #1
FC
Solving problems
 
FC's Avatar
 
Join Date: Oct 2003
Carmudgeonly Ride: '15 eGolf, '13 LR4, '11 Miata
Location: Greater Boston
Posts: 20,656
Mixing motor oils

(Stupid but interesting background)

There is a lot of drama surrounding the LR4 oil requirements.

Bottom line: the car officially requires an unobtanium Castrol OE oil (it appears that in the past year Amsoil may have come up with one that straight-up complies). Most dealers don't sell it (some don't want to, others just get massive drum and can't sell it).

That leaves the unlucky few (like me) to resort to ebay to source it at $10+ a quart. Which, BTW, is cheaper per quart than what the few dealers that do sell it sell it for.

For fear of warranty denials, I stuck to that ridiculous requirement during the warranty period. When the warranty expired, I did a baseline Blackstone lab test on the used OE Castrol, and went with Mobil1 EP - a motor oil that by nearly all accounts complies with the spec.

Ultimately, that hard-to-meet spec seems to relate to long oil service intervals anyway. LR's interval is 15k miles, which as we know, is dumb. I happen to put at most 7.5k miles/year (nowadays more like 5k/year), so the yearly change is plenty frequent enough to effectively not have to worry about any of this nonsense provided a use a decent quality oil.


I have a leftover quart of the unobtanium Castrol OE oil. The last oil change, I filled with only Mobil1 EP.

For the next oil change, can I use up that quart and fill the rest with Mobil1 EP? They are the same 5W-20 weight.
FC is offline   Reply With Quote
 

Bookmarks

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


All times are GMT -4. The time now is 01:42 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Forums © 2003-2008, 'Mudgeon Enterprises - Site hosting by AYN & Associates, LLC