Mobil 1 question
TECH Senior Member
Joined: Nov 2001
Posts: 7,234
Likes: 1
From: Mississauga, Ontario
Re: Mobil 1 question
I'm trying that same German Castrol 0w30 in my LS1 right now Patman. Let me know how your oil analysis turns out with it. It looks neon green!
Being green is one of the reasons we know for sure that this oil is in fact Formula SLX 0w30 from Germany, since the only oil that Castrol makes in green in the entire world is that formula. Castrol USA is still tight lipped about it though, they refuse to give out any more details on this oil, they still claim it's identical to the old US made 0w30, when in fact the two oils are radically different. Consensus is that Castrol USA is a bit embarressed to admit that this German made stuff is so far superior to any of the other Syntec oils made in USA, that they refuse to give out too much info on it.
TECH Enthusiast
Joined: Oct 2002
Posts: 553
Likes: 0
From: Long Island, NY
Re: Mobil 1 question
If you're mixing oils from the same brand like that, it's safe. The risk with mixing oils of different brands is that some of the additives might not be balanced so the oil would degrade itself a little quicker than normal, although in a 3k interval this wouldn't be a problem anyways, it's mostly if someone mixed two brands and then tried to run it to 10k or something.
This is why when someone does decide to do extended intervals, you should run the first interval with the new oil at about 3-5k, then do the extended interval after that, this way there is no other type of oil in there mixed in with it (when you change your oil, no matter how long you let it drain you'll still end up with 1/4 to 1/2qt of the previous oil in there, most of it stuck in the heads, oil pump, corners of the oil pan, etc.)
This is why when someone does decide to do extended intervals, you should run the first interval with the new oil at about 3-5k, then do the extended interval after that, this way there is no other type of oil in there mixed in with it (when you change your oil, no matter how long you let it drain you'll still end up with 1/4 to 1/2qt of the previous oil in there, most of it stuck in the heads, oil pump, corners of the oil pan, etc.)
Staging Lane
Joined: Mar 2007
Posts: 60
Likes: 0
Originally Posted by Fast Eddie's 02 T/A vert.
I just changed my oil.I put in a couple quarts of 15w50 with the 10w30..Mobile 1.
I did this per Patman...i learned from another thread.
I'm racing tomorrow night.
I did this per Patman...i learned from another thread.
I'm racing tomorrow night.
i gotta ask... why dont you just buy the damn 10-40?
seems MUCH more logical than messing with two oils that were made to be different even if they are the same make. 
Tech Resident
Joined: Jan 2006
Posts: 5,117
Likes: 3
From: Philly
Originally Posted by MOBE
I typically use Mobil 1. I use 10W30 though. I think 5W30 kinda thin for the Texas heat.
Walmart usually has the best price.
Walmart usually has the best price.
EDIT - aye, 4 years old? who bumped this? there's been A LOT of this ancient post bumping lately. FWIW, IMO ALL mobil 1 30 weights suck. they're all overrated and they all show mediocre at best wear results. i just picked up 18 quarts of GC 0W-30 on sale at my local autozone for $4.49/quart. i will forever use GC 0W-30 as long as i can get it after the disappointing results from mobil 1 5W-40 (more oil consumption, louder valvetrain tick, less oil pressure).
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TECH Fanatic
Joined: Jan 2003
Posts: 1,415
Likes: 1
From: San Diego/Schertz,Texas
My search continues to find 2 more quarts of GC for my next oil change. This will be my 2nd oil change with GC. Was very impressed after the first time around. Zero oil comsumption
On The Tree
Joined: Apr 2007
Posts: 120
Likes: 0
From: Marysville,OH
[QUOTE=KrazyDan]My search continues to find 2 more quarts of GC for my next oil change. This will be my 2nd oil change with GC. Was very impressed after the first time around. Zero oil comsumption[/QU
The best oil I have ever used.
The best oil I have ever used.
i cant find GC any more i got a chance to use it once. no complaints.
im a fan of amsoil i have used teh 5w40 be for but what 5W 30 amsoil are you talking about (patman) theirs a couple differant ones ASL, XLF, HDD, TSO
im a fan of amsoil i have used teh 5w40 be for but what 5W 30 amsoil are you talking about (patman) theirs a couple differant ones ASL, XLF, HDD, TSO
