Recent Topics
Ten years ago today
by UncleS2
07/23/14 05:55 PM
Change Acura TSX ATF Filter?
by artbuc
07/23/14 04:45 PM
Honest opinions on these two tires ?
by OtisBlkR1
07/23/14 04:42 PM
Fram TG8A (25K miles)
by stang5
07/23/14 04:35 PM
What is the latest on the TWC/Comcast deal?
by redhat
07/23/14 03:25 PM
2015 Lexus NX 200t - New turbo using TGMO 0W-20?
by CATERHAM
07/23/14 03:08 PM
06 Ford Focus commuter
by tmorris1
07/23/14 02:02 PM
Why would you get a scangauge....
by Nick R
07/23/14 01:39 PM
H-D Trans Fluid: Amsoil MCV 20W-50 or SVT 75W-110
by SwedishRider
07/23/14 12:08 PM
Sludge, Conventional oil, DI engines ?
by rbarrios
07/23/14 11:47 AM
Aluminum Alloy Lug Nuts?
by Johnny248
07/23/14 10:32 AM
Comparing two Mobil1 5w30 synthetic oils.
by Proxyon
07/23/14 10:19 AM
Newest Members
Gocoloco, Proxyon, malone55, EAGLE7, Davidedaniel
50723 Registered Users
Who's Online
108 registered (97f150, 57ChevyLS, 77GrandPrix, 97tbird, 2010_FX4, 71Chevyguy, 13 invisible), 1965 Guests and 237 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
50723 Members
64 Forums
216682 Topics
3410438 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Topic Options
#174648 - 02/01/06 06:21 PM can i mix 5w30 with 10w30?
tonttu Offline


Registered: 12/26/05
Posts: 151
Loc: sweden
i have gm 5w30 oils in the engine.i was thinking to put gm 10w30 in it,about 1/2,1 quart.is it ok,or should i only add 5w30 [Confused]

Top
#174649 - 02/01/06 06:21 PM Re: can i mix 5w30 with 10w30?
ToyotaNSaturn Offline


Registered: 04/11/03
Posts: 11212
Loc: Spring Hill, TN
Yes. As long as it's SL or SM rated, you'll be fine. It's completely safe to do so.

[Cheers!]

Top
#174650 - 02/01/06 06:33 PM Re: can i mix 5w30 with 10w30?
tonttu Offline


Registered: 12/26/05
Posts: 151
Loc: sweden
yes,both, 5w30 and 10w30 are sl/sj rated [Burnout] [Burnout]

Top
#174651 - 02/01/06 06:56 PM Re: can i mix 5w30 with 10w30?
TallPaul Offline


Registered: 10/22/03
Posts: 12907
Loc: By Detroit
I've even mixed straight 30 weight in with 10w30 and no apparent problems. Oh, I've mixed worse things than that too.  -

Top
#174652 - 02/02/06 01:38 AM Re: can i mix 5w30 with 10w30?
tonttu Offline


Registered: 12/26/05
Posts: 151
Loc: sweden
how about mixing 76 super synthetic blend about 1/2 or 1 quart to gm dino 10w30 4 quarts?

Top
#174653 - 02/02/06 06:04 AM Re: can i mix 5w30 with 10w30?
m2200b Offline


Registered: 08/28/05
Posts: 1574
Loc: Alamo, CA
The net effect of adding 1/2 or 1 gt of anything
in your 4.5 gt really doesn't change it much
as you can check in the shell viscosity mixer as its only changing it by 1/5 anyway. I do use add oil to aim the grade to where I want to try.

On my daughter's oil consuming tercel, I add 1 qt of 20-50 Castrol HM to see if thicker helps stop her consumption and rear main leak. On mine I add some moly laden VSOT or 10-40 to see if moly or thicker helps. Its like a low cost preview if you are going to change in 1k miles anyway.

On yours, you will change soon if you stay with 3K OIC so adding a blend with maybe 20% syn is like adding 5% syn. If you want to experiment and see how a blend works with GM dino I'd add all syn so at least you get a blend for the entire 4.5 gts. Costwise I'd add any dino since you'll drop it in a month.

Top