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Joined: Jun 2011
Posts: 217
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Jun 2011
Posts: 217 |
What grade of gas is best for my '68 SS. It's a stock 396/325.
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Willwood Engineering
Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188
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Joined: Apr 2002
Posts: 598
Oil Can Mechanic
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Oil Can Mechanic
Joined: Apr 2002
Posts: 598 |
I try to be the person my dog thought I was.
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Nov 2002
Posts: 3,163
ChatMaster - 3,000
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ChatMaster - 3,000
Joined: Nov 2002
Posts: 3,163 |
My 396/325 & my Z/28 302 run just fine on pump premium gas...Joe
See America's First...Chevrolet
1931 Sedan Delivery 31570
1933 Standard Sports Coupe 33628.
1934 Master Sedan Delivery Canadian 177/34570
1968 Z/28 Camaro
1969 SS 396 Camaro
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Joined: Mar 2013
Posts: 176
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Mar 2013
Posts: 176 |
Call me a worry wort but, but with Premium Gas your only getting 91 Octane now,and back when these engines were built that was what Regular's Octane was now. I always use 108 Octane Boost and Lead Supplements. For oil I use any 10/30 oil with Z-7 in it or I buy the Z-7 additive.
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Joined: Nov 2002
Posts: 3,163
ChatMaster - 3,000
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ChatMaster - 3,000
Joined: Nov 2002
Posts: 3,163 |
Using the proper oil for the performance engines is more important than the fuel. Today's oils are for today's cars. They don't play nice with flat tappet cams..Joe
See America's First...Chevrolet
1931 Sedan Delivery 31570
1933 Standard Sports Coupe 33628.
1934 Master Sedan Delivery Canadian 177/34570
1968 Z/28 Camaro
1969 SS 396 Camaro
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
If the engine does not ping the octane is high enough.
A different way to rate octane is used today and the numbers are slightly lower than they were in 1969. Todays preimum would be about 95 octane in 1969.
For oil I would recommend Quaker State DEFY. It has more Zinc add semi-synthetic and resonalble priced at Walmart.
This engine would be an example of and engine that would require more zinc.
Gene Schneider
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Joined: Jun 2011
Posts: 217
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Jun 2011
Posts: 217 |
Very good input. I've always used Quaker State or Penzoil motor oil in every one of my cars. Thanks to all, Bill
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Joined: Nov 2002
Posts: 3,163
ChatMaster - 3,000
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ChatMaster - 3,000
Joined: Nov 2002
Posts: 3,163 |
Here's an article worth viewing. I went with the Valvoline VR1 racing, (acceptable for street use) in my 302 Chevrolet & after about 4 or 5 miles I had to turn the idle down. Never had that happen before. The Quaker state Defy is in the top 7...Joe http://speedtalk.com/forum/viewtopic.php?f=1&t=35836
See America's First...Chevrolet
1931 Sedan Delivery 31570
1933 Standard Sports Coupe 33628.
1934 Master Sedan Delivery Canadian 177/34570
1968 Z/28 Camaro
1969 SS 396 Camaro
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