Type of gas?

[no1newb]

ive been using premium in my 73 318, but ive been wondering if it would be that big of a deal to go to regular unleaded, gas is getting higher 3.85 hear. what say? pay the extra 20 cents a gallon or go to regular?

 

[1970Duster]

You can use any grade but you'll have to bump it up a grade if the motor starts to ping

 

[1968FormulaS340]

You only need good enough gas to not have detonation.

Anything beyond that is tossing money in the toilet.

If your 73 has stock compression, regular should be fine.

 

[no1newb]

as far as i know its all stock, pulled from a 73 cuda. alright, ill switch and try it out. thanks

 

[LH23H2R]

"Premium" ( 91 octane :sign11: ) here in sunny So Cal is $4.30 / gallon plus ; over $5.00 in some areas :stop: !

I run "premium" in my daily driver '72 Coronet with its stock ( albeit with ignition upgrades ) 318 ; but , I have the timing bumped-up to its max-before-detonation setting , as the car just runs better that way
( better mileage and smoother performance ) .

 

[D Dodge]

Regular gas will be fine.

 

[dodge71demon]

try the cheap stuff if it pings try backing off the timing

 

[oneway71]

Higher octane just prevents ping. If your compression is stock and your timing is set correctly you can easily run 87.

Octane ratings, I believe, just detonates at different temperatures.

 

[caferacerx]

low comp 318's like regular 87

 

[jrlegacy23]

I had a 73 Dodge Coronet with a 318, never ran anything but 87 octane. The car ran great and had plenty of power with no detonation.

 

[green1]

Go as low octane as you can go. High octane burns slower. slowing you down if not needed ,due to high compression, etc.