Type of oil - Pontiac GTO Forum
User Tag List

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old 04-21-2019, 11:04 AM Thread Starter
 
Tflorek's Avatar
 
Join Date: Apr 2019
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Type of oil

New here have a question about motor oil. I have a numbers matching 70 gto. Motor was rebuilt bored .30 over has edelbrock carb, intake. What should I be running in it for motor oil. Some say 15w40, 5w40, 10w30 what is everyone running. Thanks
Tflorek is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 04-21-2019, 11:56 AM
 
Join Date: Jul 2016
Location: North Louisiana
Posts: 524
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
It definitely depends on who you ask.

I have a mild 455 with 6x-8 heads & a 2802 Summit cam. I use Rotella T4 15w-40, because it supposedly has about a 1200 count of ZDDP. It's a bracket car. So, when I take it to the track this summer I'll add a bottle of STP oil treatment. Will make the hot oil a little thicker, and will also add a little ZDDP.

Some recommend thinner oil, with a high amount of ZDDP additive already in it.

Some insist on synthetic oil.

https://www.google.com/search?q=zddp...hrome&ie=UTF-8

https://www.google.com/search?q=best...hrome&ie=UTF-8
bigD is online now  
post #3 of 12 (permalink) Old 04-21-2019, 12:57 PM
 
GTO44's Avatar
 
Join Date: Apr 2016
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
I also recommend a ZDDP additive if it has a flat tappet cam. I always use the Comp zddp additive for any of my customer cars when we do a flat tappet cam install.
https://www.summitracing.com/parts/CCA-159 .
For oil, 40weight or a 50weight unless you’ve a recent rebuild with tighter bearing tolerances. The type of oil is less relevant when your using an additive like above...

2006 GTO M6

Motor - Stock with Vararam
Bunch of suspension
Bunch of brakes
Stock tune

365/368 std
12.81 @ 110.6 2.03 60'
GTO44 is offline  
 
post #4 of 12 (permalink) Old 04-21-2019, 01:09 PM Thread Starter
 
Tflorek's Avatar
 
Join Date: Apr 2019
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
The rebuild is a few years old sorry should have said that. So shell 5w40 synthetic should be good then and still add ZDDP additive to ?
David Shuff likes this.
Tflorek is offline  
post #5 of 12 (permalink) Old 04-22-2019, 01:09 PM
 
GTO44's Avatar
 
Join Date: Apr 2016
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Quote:
Originally Posted by Tflorek View Post
The rebuild is a few years old sorry should have said that. So shell 5w40 synthetic should be good then and still add ZDDP additive to ?
How many miles on the rebuild?

2006 GTO M6

Motor - Stock with Vararam
Bunch of suspension
Bunch of brakes
Stock tune

365/368 std
12.81 @ 110.6 2.03 60'
GTO44 is offline  
post #6 of 12 (permalink) Old 04-22-2019, 06:15 PM
 
RMTZ67's Avatar
 
Join Date: Mar 2011
Location: Albuquerque N.M
Posts: 212
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Garage
Quote:
Originally Posted by GTO44 View Post
How many miles on the rebuild?
Thats the real question. I have a five year old rebuild on a Z28 I own but only 2000 miles. Not sure what's to early for synthetic.

Last edited by RMTZ67; 04-22-2019 at 08:55 PM.
RMTZ67 is online now  
post #7 of 12 (permalink) Old 04-23-2019, 01:25 PM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 8,457
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 98 Post(s)
Been running Rotella 15/40 for years and years, but it's hot where I am. 10/30 diesel spec oil would be fine as well, or any of the high ZDDP and expensive boutique oils like Brad Penn in 10/30 or 15/40.
geeteeohguy is offline  
post #8 of 12 (permalink) Old 04-29-2019, 09:02 PM Thread Starter
 
Tflorek's Avatar
 
Join Date: Apr 2019
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Ok finally narrowed it down that there is about 700 miles on the rebuild. So what additives and oil still 5w40??
Tflorek is offline  
post #9 of 12 (permalink) Old 05-01-2019, 01:00 PM
 
GTO44's Avatar
 
Join Date: Apr 2016
Posts: 316
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Quote:
Originally Posted by Tflorek View Post
Ok finally narrowed it down that there is about 700 miles on the rebuild. So what additives and oil still 5w40??
Non synthetic for sure. Motor needs 2-3k miles on it before before switching over. 5w-40 will work. The viscosity is more about what type of climate/weather you’re in. VR1 racing oil is great and already has the additives. If not get what ever type of oil and add the ZDDP additive.

2006 GTO M6

Motor - Stock with Vararam
Bunch of suspension
Bunch of brakes
Stock tune

365/368 std
12.81 @ 110.6 2.03 60'
GTO44 is offline  
post #10 of 12 (permalink) Old 05-12-2019, 11:29 AM Thread Starter
 
Tflorek's Avatar
 
Join Date: Apr 2019
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Found out that Lucas makes a 10w30 oil for classic cars with high zinc properties. Thanks for the help!
Tflorek is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum 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











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
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil type and capacity Jstreet 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 49 10-29-2009 10:52 PM
oil type for 70 ys 400 even steven 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 2 07-06-2009 01:05 PM
oil type bigboom44 2004-2006 GTO General Discussion 28 03-13-2009 10:00 AM
oil filter type? vanillagorila Service, Maintenance and Technical Discussion 24 12-31-2007 09:11 AM
oil type sandlakeont 2004-2006 GTO General Discussion 11 04-25-2005 08:09 PM

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