5w-30 to 5w-20. - GMC Acadia Forum: AcadiaForum.net
Reply
 
LinkBack Thread Tools
post #1 of 12 (permalink) Old 06-01-2012, 10:51 PM Thread Starter
Jr. Member
 
Join Date: Apr 2011
Posts: 55
5w-30 to 5w-20.

Is there any harm on this.. I was changing oil and about halfway through the 5.1 qt i realized the darn thing is 5w-20 instead if 5w-30... Now i can just drain it again and get the right one but is there any harm if i keep it since i already poured it in?

Thanks for any input on this.
pinoyxprss is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 06-02-2012, 07:34 AM
Hero Member
 
Join Date: Dec 2007
Posts: 889
Re: 5w-30 to 5w-20.

I would drain it and use the recommended weight/viscoity oil. Bearing clearances are set up for a certain oil type. Would you be okay with 5W-20 if you kept an eye on oil pressure (I can't remember if we actually have that gauge in the Acadia)? Probably. But I wouldn't chance it.

2015 Acadia SLT-1, premium package<br />[s]2011 Acadia SLE AWD[/s]<br />[s]2008 Acadia SLT-1[/s]<br />2016 Mustang GT<br />1995 Trans Am - 383 stroker<br />2004 Nissan 350Z
Jeff95TA is offline  
post #3 of 12 (permalink) Old 06-02-2012, 11:18 AM Thread Starter
Jr. Member
 
Join Date: Apr 2011
Posts: 55
Re: 5w-30 to 5w-20.

Theres no oil pressure guage, i finished oil change... Seem fine but i guess i can drain and replace oil.. Do i have to replace filter again or can i leave it ? Its such a pain to replace and it makes a whole lot of mess. =D
pinoyxprss is offline  
Sponsored Links
Advertisement
 
post #4 of 12 (permalink) Old 06-02-2012, 12:15 PM
Hero Member
 
Join Date: Aug 2009
Posts: 733
Re: 5w-30 to 5w-20.

I would leave it in and just change it a little early next time, most engines still spec 5w-30 or 10W-40 for oil so I wouldn't think it is that big of deal. If you car speced 20W-50 I would say that is a little too much of a change but again that is just my opinion and do whatever you feel is right.

The first number is how thick the oil is when cold and the last number indicates how think the oil will be when hot. The 5W-20 would be better to run in the cooler weather as it is thinner, considering you are in CA and it will be hot I wouldn't tow a trailer with the 5W-20 oil in it. Many MFG's now spec spec the 5W-20 to get better MPG's as a thinner oil has less drag on the motor.

Do a google search and you will get 50% thats says it okay and 50% that says don't do it. I used to run 10W-40 Mobil 1 in my 2003 Corvette ZO6 as I would take it out on track days and the oil temp would be over 300 degrees on hot days. The manual called for 5W-30 but I felt better running the thicker oil in the hot weather, some people at the track also ran 20W-50 without a problem but again do whatever you feel is right.

2010 Red Jewel Acadia SLT-2 FWD, Cashmere Interior, Sunroof, Cooled Seats.<br />2010 Corvette Grand Sport<br />2007 Miata
MA Acadia is offline  
post #5 of 12 (permalink) Old 06-02-2012, 01:05 PM Thread Starter
Jr. Member
 
Join Date: Apr 2011
Posts: 55
Re: 5w-30 to 5w-20.

Thnx for the input, i did google and read a lot of post, theres not much difference on 5/20 and 5/30 so i'll leave it.
pinoyxprss is offline  
post #6 of 12 (permalink) Old 06-02-2012, 09:15 PM
Acadia Freak
 
Join Date: Dec 2007
Posts: 1,323
Re: 5w-30 to 5w-20.

I don't know if it would be worth the hassel, but you could drain some out and then top off with a thicker 5W40. There are visocisity calculators on the internet....I don't know how much you would have to drain off or if it would be worthwile.

I would leave it in then change out at 3 or 4 K. I picked up a gallon bottle of Penz Ultra 5w20 for $7 on clearance and plan on using that in mine down the road....I just have some older oils to use up first. I will top off with a 5W40 to "thicken" it up a tad.

2007 Liquid Silver Acadia<br />2003 Ford Excursion 7.3 L Diesel
MedicRxDoc is offline  
post #7 of 12 (permalink) Old 06-02-2012, 09:42 PM
Full Member
 
Join Date: Nov 2007
Posts: 231
Re: 5w-30 to 5w-20.

Quote:
Originally Posted by pinoyxprss
Is there any harm on this.. I was changing oil and about halfway through the 5.1 qt i realized the darn thing is 5w-20 instead if 5w-30... Now i can just drain it again and get the right one but is there any harm if i keep it since i already poured it in?

Thanks for any input on this.
I'd say it's not a problem to use it for one drain interval. On my 04 Toyota V6, which initially had 5W30 oil called out, Toyota has officially changed the recommendation to allow 5W20 or 5W30, as well as for many other older Toyota engines(but not all).

Dave

2008 AWD SLT-2 Blue Gold Met/Ebony, 18", NAV, HUD, XM, Built 11/07<br />2004 Toyota Highlander AWD Ltd
Snoguy is offline  
post #8 of 12 (permalink) Old 06-02-2012, 10:29 PM
Hero Member
 
Join Date: Aug 2007
Posts: 500
Re: 5w-30 to 5w-20.

I ran a 5w-20 in our 08 Acadia with no issues and took it up to 4k miles. The UOA showed that it did well and no more wear than when I ran the 5w-30. The only issue that might come into play is the VVT, since it is hydraulic and runs off the engine oil and the engine is spec'ed for a 5w-30.

AMSOIL Synthetic Lubricants & Filtration Systems, Click Here<br />2011 Red Jewel SLT-2<br />[URL=http://www.fuelly.com/driver/rat407/acadia]
Rat407 is offline  
post #9 of 12 (permalink) Old 06-03-2012, 07:44 PM
Hero Member
 
Join Date: Mar 2007
Posts: 665
Re: 5w-30 to 5w-20.

I would not run the 20w (and that is what it is for most of the time that the vehicle is running) oil in this vehicle considering that there has been some indication that there is a relationship between the timing chain issues and lubrication. Yes, the root of the lubrication issues would undoubtedly be a factory design issue in this case, but why aggrevate the situation by using sub standard oil viscosity. There are certainly a few engines designed for these oils. Mostly Japanese from what I can see, but it appears that 20w oil is all about eeking out the last MPG in government economy testing, as opposed to reliability. I found it interesting that my Mazda specs out 5w-20 here in the US, but in every other country in the world they spec 5w-30 for the same engine. Considering the coming warmer weather and the timing chain issues, I would change it to an oil within spec. As they say....your mileage may vary......

2007 Acadia SLT2, AWD, Gold Mist/Brick
GerryL is offline  
post #10 of 12 (permalink) Old 06-04-2012, 10:39 AM
Acadia Freak
 
Join Date: Jan 2008
Posts: 1,290
Re: 5w-30 to 5w-20.

My wife's Pontiac Vibe has a Toyota 2.4 liter in it.
In the owner's manual Pontiac states 5W-30.
In the toyota Matrix manual it states 5W-20.

Exact same engine, trans, etc.....Go figure.

I use Toyota's recommended 5W-20 as they are the engine manufacturer.

2009 GMC Acadia SLE, FWD.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; <br />Quicksilver/Titanium, Convenience/&nbsp; &nbsp; &nbsp; <br />Preferred/Visibility/Trailering.<br />SAC Member
Copperhead13 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the GMC Acadia Forum: AcadiaForum.net forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome