Recent Topics
OCI advice for a newbie...
by Starman2112
47 minutes 53 seconds ago
Rain-X 2-in-1 orange washer fluid stinks!
by mclasser
Today at 10:02 PM
Little plastic unicorns...
by Shannow
Today at 09:20 PM
BJ's Price club Pennzoil Plat 10w-30 at $3.33/qt
by 69GTX
Today at 09:15 PM
Master Cylinder question
by mike7139
Today at 09:15 PM
Rear end feels like its "loose"
by ChevyGuy3100
Today at 07:41 PM
Don't forget your power steering fluid!
by meborder
Today at 07:27 PM
Went from Defenders to Premiers.
by N3OO
Today at 07:23 PM
Cordless impact
by FastLane
Today at 07:09 PM
Castrol Syntec 0w-40 Euro
by Barwich
Today at 06:51 PM
The making of the shif knob
by widman
Today at 06:40 PM
valve stems seal over time?
by edwardh1
Today at 06:21 PM
Newest Members
TexTac, golddredgewater, Fromsauga, Mortimer, BreakerBreaker
56156 Registered Users
Who's Online
58 registered (bbhero, BrocLuno, charlesb2003, crazyoildude, bdcardinal, 7 invisible), 1001 Guests and 133 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
56156 Members
66 Forums
241211 Topics
3907693 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3208565 - 12/06/13 01:41 PM Oil mix?
Keith_Stone Offline

Registered: 05/22/11
Posts: 298
Loc: NC
If wanting a little "boost" to a basic synthetic oil, i.e bumping up the moly and adding a little ester to the base stock, would adding a qt. of Redline be of any benefit to the mix?
NRA Lifer

#3208570 - 12/06/13 01:45 PM Re: Oil mix? [Re: Keith_Stone]
bigjl Offline

Registered: 09/06/12
Posts: 1741
Loc: London, England
As oils are a mix of different things i would think it would have some benefit if the oil being added is a better quality than the stuff in the sump

Wether you or the engine would notice i am not so sure.
10 BMW 116D SE 110k miles Full BMW Hx
12 Jaguar XJL 3.0 D Luxury 132k 5w30 Shell AF-L

#3208571 - 12/06/13 01:45 PM Re: Oil mix? [Re: Keith_Stone]
bepperb Offline

Registered: 01/10/08
Posts: 4929
Loc: Milwaukee, WI
For the price of a basic synthetic oil and a quart of redline you probably could have just bought a top of the line synthetic to begin with... ie... M1 EP, Castrol 0w-30, or Pennzoil Ultra.
2004 Highlander 2.4
2011 Toyota Sienna 3.5
Recently Gone:
2006 Accord 2.4l K24A8
1993 Kawi EX 500

#3208575 - 12/06/13 01:47 PM Re: Oil mix? [Re: Keith_Stone]
Clevy Offline

Registered: 11/11/10
Posts: 9776
Loc: Saskatoon canada
One would think that mixing oils isn't complimentary to each oils strengths however there are quite a few frankenbrew used oil analysis posted here that are stellar,so with that knowledge I doubt it will hurt anything
2006 Charger RT
Miles x 2 per oil filter

#3208624 - 12/06/13 02:18 PM Re: Oil mix? [Re: Keith_Stone]
Donald Offline

Registered: 03/21/04
Posts: 15594
Loc: Upstate NY
Why? Buy the best oil you can easily afford and forget mixing.
2015 Subaru Forester 2.5 engine/CVT PP & M1
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1

#3208644 - 12/06/13 02:38 PM Re: Oil mix? [Re: Keith_Stone]

Registered: 11/18/05
Posts: 9978
Loc: Burlington, Ontario, Canada
RL oils are primarily PAO based and their current reformulated street oils probably contain no more than 15% POE.
All PAO based oils contain some esters.
Adding a quart of RL to a GP III synthetic isn't going to add much ester but as you pointed out you would be likely be increasing the moly level but what you will be really increasing is the ZDDP level which is very high in RL oils.

So the primary benefit I can see in adding some RL would be to increase the ZDDP level of an OTC GP III oil if you think the engine would benefit from a higher AW level, that primarily being increased ZDDP.

BTW, my favourite RL grades are 0W-20, 0W-40 and 5W-50 for blending purposes.
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 90%/0W-50