oopps... is this bad?? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 10-21-2005, 04:33 PM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Cincinnati
Posts: 95
Thanks: 0
Thanked 0 Times in 0 Posts
atauri_92 is on a distinguished road
Default oopps... is this bad??

ok so this is like my thirs oil change since i got the bone... for some reason i got and put 10w40, not 10w30 in the car...crap! what effects can this have on the car.. i am really more concerned about any problems that might happen?? let me know
its a 98 ssei just so you all know....thanks in advance
atauri_92 is offline   Reply With Quote
Old 10-21-2005, 06:17 PM   #2
Senior Member
Posts like a Northstar
 
Join Date: Sep 2005
Location: Dayton, OH
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
imidazol is on a distinguished road
Default Re: oopps... is this bad??

Quote:
Originally Posted by atauri_92
ok so this is like my thirs oil change since i got the bone... for some reason i got and put 10w40, not 10w30 in the car...crap! what effects can this have on the car.. i am really more concerned about any problems that might happen?? let me know
its a 98 ssei just so you all know....thanks in advance
If I recall correctly the compounds used to make the molecules change from 10 weight to 40 weight tend to cause deposites in the rings. That was why GM banned that weight long ago. Now???

I'd just bit the bullet change the oil with 10-30 take off the filter and drain it and reinstall it.
imidazol is offline   Reply With Quote
Old 10-21-2005, 06:53 PM   #3
Guest
Posts like a Northstar
 
Join Date: Nov 2004
Posts: 584
Thanks: 0
Thanked 0 Times in 0 Posts
ssei1995 is on a distinguished road
Default

You should not have any problems with the 10w40 oil. I have the oil dealer changed at the Pontiac delaership only since they have a Quick Lube outlet; the oil weight they use is 10W40.
ssei1995 is offline   Reply With Quote
Old 10-21-2005, 09:16 PM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Oct 2005
Location: Purvis, MS
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
supernate is on a distinguished road
Default

I tend to agree with ssei1995, 40 means it will stay thicker at higher temps. If your car has any problems with blow-by this might even help it a bit. If you ever used one of those "stop blue smoke" products you notice that it'* like putting honey in your motor, and the label says good for any vehicle. I might be wrong but I would just say go back to 10w30 at your next change.
supernate is offline   Reply With Quote
Old 10-21-2005, 09:25 PM   #5
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

No problem at all.
Don't worry about it.
It really means that when the oil is cold (rated at 0*C) it'* viscosity won't be thicker than 10 weight and when warm (rated at 100*C standard) it'* viscosity won't be thinner than 40 weight.
If you can get away with it you should use thinner oil...ideally 0 weight...to keep frictional losses to a minimum in order to maximize hp when starting in cooler weather.

The wider the viscosity range, the better quality oil....usually.

Racers will sometimes use 0W30.
If you drive in warmer temps you should use a straight weight oil like 30.

I use 5W50 in my 6.6L and 5W30 in my 3.8L
I use 75W140 for my rear drive differentials.
2000SilverBullet is offline   Reply With Quote
Old 10-21-2005, 10:09 PM   #6
Senior Member
True Car Nut
 
Join Date: Jul 2004
Location: Grand Rapids, Mi
Posts: 5,656
Thanks: 0
Thanked 0 Times in 0 Posts
Archon is on a distinguished road
Default

About a month ago, I was at the store doing my shopping, including getting some oil for my car. A man stopped me to talk about the oil that I had just purchased. As i turned out, he was a recently retired engineer from GM who worked with their various engines. He mentioned that the Valvoline 5w-30 turned out tops in the tests that they ran. He also said that none of the brands tested 10w-40 weight passed their tests. Unfortunately, as I was pressed for time, I didn't have the opportunity to ask him the 50 or so questions that I would have liked to have asked. I doubt that one use of the 10w-40 is going to cause any long term problems, but based on his advice, I would stay away from using it regularly.
Archon is offline   Reply With Quote
Old 10-22-2005, 12:00 AM   #7
Senior Member
Posts like a Corvette
 
Ol' Timer's Avatar
 
Join Date: Oct 2002
Location: New Jersey - Most of Our Elected Officials Have Not Been Indicted
Posts: 1,483
Thanks: 0
Thanked 0 Times in 0 Posts
Ol' Timer is on a distinguished road
Default

Agreed with the above posts. You might lose 1 mpg but I would keep it in the crankcase until your next scheduled oil change. I go with 5W-30 Dino Oil during the winter months.
Ol' Timer is offline   Reply With Quote
Old 10-22-2005, 03:51 PM   #8
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Dec 2004
Location: Cincinnati
Posts: 95
Thanks: 0
Thanked 0 Times in 0 Posts
atauri_92 is on a distinguished road
Default

ok...i was worried there for a while.. but if you all think it should be more than good.. i will take your word(*) for it.... thank to all, and thanks it will not happen again
atauri_92 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Bad, bad, bad, bad vibrations.... SilverSleeper8704 2000-2005 11 07-30-2010 06:42 AM
BAD one liners. Bad, really really bad, but still funny. BonnieBrougham Lounge 3 12-16-2004 06:38 PM
Bad bad news h1081dan Lounge 22 10-29-2003 12:54 AM
One Bad Bad Ride lash92ssei Your Ride: GM Pictures & Videos 12 08-19-2003 05:05 PM
SuperCharger Pulley...bad for supercharger...bad for mileage Mr Bean 1992-1999 9 02-20-2003 12:34 AM


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 Off
Refbacks are Off



All times are GMT -4. The time now is 09:48 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.