Can I mix 5W-30 with 10W-30 ? - LS1TECH

Log In 


Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Can I mix 5W-30 with 10W-30 ?

Reply
 
Thread Tools Search this Thread
Old 04-03-2003, 10:28 AM   #1
TECH Fanatic
Thread Starter
iTrader: (9)
 
Join Date: Mar 2002
Location: Greenville, SC
Posts: 1,124
Default Can I mix 5W-30 with 10W-30 ?

I'm gonna change my oil in a few days. I usually run Syn 10W-30, but was thinkin about mixing it 50/50 with some Syn 5w-30 cuz the Owner's manual recommends 5W-30.
My car burns a quart per oil change with all 5W-30, and none with 10W-30..I was thinkin the 50/50 mix might be a good idea...is it?
NOBR8KSS is offline   Reply With Quote
Old 04-03-2003, 01:20 PM   #2
TECH Junkie
iTrader: (9)
 
Fulton 1's Avatar
 
Join Date: Dec 2001
Location: WA
Posts: 3,326
Default Re: Can I mix 5W-30 with 10W-30 ?

Not that mixing the two would cause any harm, but I'd just stick with the 10W-30 myself.
Fulton 1 is offline   Reply With Quote
Old 04-03-2003, 02:24 PM   #3
TECH Senior Member
 
Patman's Avatar
 
Join Date: Nov 2001
Location: Mississauga, Ontario
Posts: 7,234
Default Re: Can I mix 5W-30 with 10W-30 ?

There is simply no need to mix 5w30 and 10w30, stick with the 10w30 in warm weather, and 5w30 for the cold. Or better yet, try out Mobil 1's 0w40 instead. Despite the 0w rating, it's thicker at 40 celcius than 5w30 and 10w30 Mobil 1.

<small>[ April 03, 2003, 02:26 PM: Message edited by: Patman ]</small>
Patman is offline   Reply With Quote
Old 04-03-2003, 05:28 PM   #4
Teching In
 
Join Date: Jan 2003
Location: Fairmont, WV
Posts: 12
Default Re: Can I mix 5W-30 with 10W-30 ?

Go with all 10W-30 if your car is not burning any. Mobil 1's 5W-30 and 10W-30 oils are almost exactly the same when at operating temp. 9.7 cst and 9.8 cst. The 5W-30 has better cold weather properties but would only make a difference at 0 deg and below. 10W-30 M1 will still pump at -49 below zero!!!!
Ryan00TJ is offline   Reply With Quote
Old 04-04-2003, 12:43 AM   #5
On The Tree
 
thefast1's Avatar
 
Join Date: May 2002
Location: kentucky
Posts: 141
Default Re: Can I mix 5W-30 with 10W-30 ?

i use 4 qts 10w30 and 2 qts 15w50 mobil 1.my car did use about 1/2 qt every 2000 miles with 5w30,and hasnt used hardly any since i started doing so. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
thefast1 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
0w-40 99huggerorangeZ Generation IV Internal Engine 57 06-21-2016 02:36 PM
Oil advise. Ape Man Generation III Internal Engine 18 10-13-2015 06:41 PM
Viscosity change thecabani30 Generation III Internal Engine 4 08-29-2014 02:44 PM
*solved* low oil pressure after cam + head swap juiSSed1172 Generation III Internal Engine 9 08-02-2007 07:55 PM
5w30 and 10w30 at the same time? lrk322 New LS1 Owners - Newbie Tech 1 05-29-2004 10:14 PM


Tags
10w, 10w30, 30, 5, 5w, 5w30, bad, cobalt, engine, mix, mixing, mobil, mobile, oil, put, qts, with10w30

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 03:25 PM.