Author Topic: What octain gas do I need for my 1960 Tri-power engine  (Read 2949 times)

Offline 60eldo

  • Posts: 1439
  • EVERYDAY ABOVE GROUND IS A GOOD DAY
  • Name: Jon Kluczynski
What octain gas do I need for my 1960 Tri-power engine
« on: November 15, 2012, 09:49:19 PM »
   Some say I need 100 octain,,,is this true...should I add octain boost?
« Last Edit: November 16, 2012, 12:02:02 AM by 60eldo »
Jon. Kluczynski

Offline 76eldo

  • Posts: 6651
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  • Name: Brian Rachlin
Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #1 on: November 15, 2012, 11:50:05 PM »
I have a 60 convertible with the Q-code Tri Power engine. I run pump premium with no pinging or other problems. At 8 mpg or so you will go broke in a hurry running 100 octane race gas and its totally unnecessary. Try to avoid ethanol if possible.

Brian
Brian Rachlin
Huntingdon Valley, Pa
CLC # 22443
I prefer email's not PM's rachlin@comcast.net

1960 62 Series Conv with Factory Tri Power
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Offline Renato

  • 1957 Cadillac Fleetwood
  • Posts: 249
Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #2 on: November 16, 2012, 12:41:25 AM »
Ohh guys in Europe we using 95 octan and Caddys works great. The key for the long time is the lead treatment. I attached a picture. This item avaliable in the States too. You must use it to protect the valves in the engine.

The old East-block cars can it 65 octan.

My opinion is do not try ethanol. Ethanol slowly kills the valve cover gasket and can eat the rubber tubes too.
R. Bognar

Offline curly

  • Posts: 362
  • Name: T Lewis
Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #3 on: November 16, 2012, 10:26:04 AM »
I'm in a rural area, best I can get is 91 octane. My 59's engine is newly rebuilt w/.040 oversize pistons, yet it seems perfectly happy with the fuel I am using.  Warm weather may be a different story.

T Lewis

Offline David King (kz78hy)

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Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #4 on: November 16, 2012, 02:44:19 PM »
I run premium  pump fuel (91 octane) in my 58 Brougham.  It is the 365 tripower and 10:1 compression.  It is bored 0.030 over.

I have had no issue with it pinging, even pulling the hills in WV going to the Grand National last summer.  Timing is set to factory spec (I think 10 degrees BTC).

Unfortunately, here in the metro Detroit area, alcohol blended fuel is all that is available, unless you buy $8/GL racing fuel.
David King
CLC 22014  (life)
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Offline linchero

  • Posts: 194
  • Name: J,Grama
Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #5 on: November 16, 2012, 07:34:49 PM »
im running 93 octane no ethonal  local station runs good so far   big bucks.

Offline Jason Edge

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  • CLC Number: 14225
  • Name: Jason Edge
Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #6 on: November 16, 2012, 08:47:56 PM »
The owners manual for the 64 Cadillacs recommended 100 Octane RON, or 89 Octane MON method. Today's pump rating in the US is an average between the Ron and Mon methods. Here is a bit of info we keep posted on the 63/64 Cadillac Site on our Help Page:

Note the (R + M)/2 you see on pumps in U.S. This average of the RON & MON ratings is also called the PON rating. In your 1964 Owner Manual on page 36 it indicates to use Minimum of 100 octane RON, or 89 octane MON. If you do the math to get the PON # that comes out to 94.5. So..that means the 93 Octane Premium in the US (PON) and the 99 Premium in the UK (RON) are both just tad lower than the recommended minimum octane for our 10.5 to 1 compression engines. My 64 CDV runs fine on 93 Octane but always dump just a bit of octane booster in and it really seems to make a difference.
Jason Edge
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Offline D.Yaros

  • The Gray Lady, a '55 Coupe de Ville
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Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #7 on: November 16, 2012, 09:10:18 PM »
My '55 runs just fine on 87 octane?
Dave Yaros
CLC #25195
55 Coupe de Ville
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Offline Jeff Wilk

  • J. Wilk CLC # 25630
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Re: What octain gas do I need for my 1960 Tri-power engine
« Reply #8 on: November 16, 2012, 09:33:05 PM »
Same here with our 59 Tri-power Fleetwood.....well.....that's when it was on the road 14 months ago now  :'(.......at that time we are running straight out of the pump good ol Northeast ethanol added premium gas at 93 Octain.......no pinging and great acceleration.........can't wait to see how it performs now that the tri-power has been fully rebuilt.......soon.....soon.....soon.....right? :(
"Impossible Only Describes The Degree Of Difficulty" 

Southern New Jersey

1959 Cadillac Fleetwood Sixty Special
1975 Eldorado Convertible (#12 made)
1976 Cadillac Mirage (factory authorized Pick-Up)
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