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#4621572 - 01/02/18 10:16 AM Oil recommendation for LS swapped Miata
Ace_Protege Offline


Registered: 06/01/09
Posts: 34
Loc: FL
I have a 95 miata with an L33 LS based engine(5.3 from 2005 silverado, alum. block, 10.5 compression, mild camshaft, roller lifters, Stock rotating assembly with new bearings and pistons/rings) Obviously the car is a weekend car and sees <5000 Miles per year, but it does see drag racing and other hard driving. The tune is a bit on the rich side so it likely has some contamination, this will be the second oil change after break in. I will be sending a sample in to Blackstone for analysis from this drain. For break in I used SAE30 with a break in additive for 100 miles, then I used the bulk oil we have at our shop (amalie 5w-40 elixir) for 2500 miles, both times I used an OE ACDelco filter.
I live in Central Florida where the climate is pretty hot. I'd like to use a high quality oil to offer the most protection possible, within reason of course.
Thanks in advance for all your suggestions.

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#4621594 - 01/02/18 10:40 AM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
rooflessVW Online   content


Registered: 12/24/11
Posts: 4059
Loc: North Carolina
Mobil 1 0W-40 should serve you well.
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#4621619 - 01/02/18 11:00 AM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I see you are in Florida.

All I have ever run in my drag cars is 15W-40 (Rotella, Delo, Delvac etc)

That's a VERY tough engine that doesn't need any type of "boutique" oil.
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#4621698 - 01/02/18 12:09 PM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
BrocLuno Offline


Registered: 09/06/15
Posts: 5519
Loc: Kalifornia Kollective
+1 laugh
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Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4621706 - 01/02/18 12:19 PM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
Cujet Offline


Registered: 02/15/03
Posts: 7162
Loc: Jupiter, Florida
A synthetic 10W-30 or 5W-40 is a good choice for a mild engine in Florida. 15W-50 synthetic is the right choice for track days.
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#4621799 - 01/02/18 01:49 PM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
TinyVoices Offline


Registered: 09/12/16
Posts: 483
Loc: Vienna, VA
Most of my LS buddies turbo or NA run an hdeo 5w40
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1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
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#4622098 - 01/02/18 07:04 PM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
Charlie2015 Offline


Registered: 04/24/15
Posts: 241
Loc: Georgia
Castrol GTX 20w50
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#4622125 - 01/02/18 07:27 PM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
OVERKILL Offline


Registered: 04/28/08
Posts: 36464
Loc: Ontario, Canada
M1 0w-40. It's what GM uses in their race program Corvettes IIRC.
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#4622188 - 01/02/18 08:27 PM Re: Oil recommendation for LS swapped Miata [Re: rooflessVW]
jdavis Offline


Registered: 12/22/05
Posts: 675
Loc: New England
Originally Posted By: rooflessVW
Mobil 1 0W-40 should serve you well.


end of thread

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#4622206 - 01/02/18 08:48 PM Re: Oil recommendation for LS swapped Miata [Re: OVERKILL]
dparm Offline


Registered: 04/19/10
Posts: 13466
Loc: Chicago, IL
Originally Posted By: OVERKILL
M1 0w-40. It's what GM uses in their race program Corvettes IIRC.


Never heard that before, but GM is switching over to a new M1 0w40 variant as the FF/service fill for Corvettes starting in 2019 MY. Details are still a bit hazy.
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#4622239 - 01/02/18 09:25 PM Re: Oil recommendation for LS swapped Miata [Re: dparm]
OVERKILL Offline


Registered: 04/28/08
Posts: 36464
Loc: Ontario, Canada
Originally Posted By: dparm
Originally Posted By: OVERKILL
M1 0w-40. It's what GM uses in their race program Corvettes IIRC.


Never heard that before, but GM is switching over to a new M1 0w40 variant as the FF/service fill for Corvettes starting in 2019 MY. Details are still a bit hazy.


In trying to find it, I discovered that it is the recommended service fill for the Z06 when sold in Europe as per this thread.
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#4622258 - 01/02/18 09:37 PM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
OVERKILL Offline


Registered: 04/28/08
Posts: 36464
Loc: Ontario, Canada
Also, somewhat amusing, Mobil 1 5w-30, 0w-40 and 15w-50 show up on the Mobil 1 Racing product website. M1 0w-40 carries the following description:

Quote:
Used as factory fill in many production road car models and continues to win in the IMSA WeatherTech SportsCar Championship and multiple Porsche Customer Racing series.


Porsche Customer Racing series doesn't sound overly spectacular, however the former includes two Corvette Race teams and two Porsche GT teams.

The Corvette teams have some pretty good records in the 12 and 24hr races. They are presently in 1st place in GT Le Mans.
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#4622420 - 01/03/18 05:04 AM Re: Oil recommendation for LS swapped Miata [Re: Ace_Protege]
KL31 Offline


Registered: 06/03/16
Posts: 549
Loc: South OZ
If you're in warm weather 15W40 would never be an issue either so up to you really. But on a more serious note, how fast would that thing be? Vids? grin
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95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
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