Engine Oil - Team Camaro Tech
Engine General Engine Discussion.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Jul 13th, 09, 06:36 PM Thread Starter
Tech Team
Join Date: Aug 2008
Location: winston salem, NC
Posts: 87
Engine Oil

The 327 in my 68 Camaro was rebuilt about 4 years ago, I have always used SAE 30 HD motor oil. For what ever reason it is getting harder to find 30 weight in my area. Would changing it to 10 w 30 cause any problems or concerns ??

loveoldchevys is offline  
Sponsored Links
post #2 of 4 (permalink) Old Jul 13th, 09, 06:57 PM
Super Moderator
Bess-68's rule
Everett#2390's Avatar
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,755
Re: Engine Oil

No problems at all.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - Thank you, Joe Madden enjoy your next chapter.
Everett#2390 is offline  
post #3 of 4 (permalink) Old Jul 13th, 09, 08:00 PM
Senior Tech
Join Date: Mar 2009
Location: Lyman, SC
Posts: 8,348
Re: Engine Oil

If you've got a Wal-Mart around as I'm sure Winston Salem does, they have several brands of straight 30 weight. I just bought some cheap SuperTech HD-30 for my lawn mower. I know they have Castrol 30 and a couple of other brands.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
Steiner is offline  
post #4 of 4 (permalink) Old Jul 14th, 09, 08:24 AM
Tech Team
Join Date: Jul 2009
Location: Fort Erie, ON
Posts: 94
Re: Engine Oil

Straight 30-weight oils are often specified for use in air-cooled engines because they don't have any Viscosity Index Improvers (VIIs), which can Shear Down under high temperature and load. VIIs are polymer additives that increase an oil's viscosity as its temperature increases.

Multi-grade dino (conventional) oils start off as a light weight oil (like a 10W oil in a 10W-30). Over time, the hot viscosity of a 10W-30 dino oil decreases because the VIIs become shorter. In contrast, a synthetic 10W-30 starts off as a 30-weight oil which is manufactured to have the viscosity of a 10W oil at cold temperatures. A synthetic oil uses very little, if any, VIIs and is therefore much more shear-stable than a dino oil.

Modern 10W-30 oils are a lot better than what was available in 1967 so you should not have any problems using a 10W-30 dino oil. Since your engine has a flat tappet cam and minimal emission controls, you would be better off using a Heavy Duty Engine Oil (HDEO) because they have stronger anti-wear and detergent/dispersant additives than a Starburst oil.

Although 10W-30 HDEOs are available, I would also consider using a synthetic 30-weight HDEO. However, due to their ability to flow in extreme cold, 30-weight HDEOs are usually found as 0W-30 and 5W-30. Because of their high viscosity indexes, 0W-30 oils will not thin out as quickly as a straight SAE 30, even in Furnace Creek in July.

See the ACCCC Engine Oil Article for more information.

For a list of 30-weight HDEOs, see Heavy Duty Engine Oils.
fraso is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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