Classic car and non-oxy gasoline

Maintenance/Repairs
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1

I’m trying to use the non-oxy gasoline to avoid the 10% ethanol in reg gas on my collector car (1973). Just filled it up and it runs rough & idles slower. Does using non-oxy require carb adjustment, or is this bas gasoline

2

There’s no carb adjustment required between the use of oxy or non-oxy gasoline. You may have gotten a bad tank of gas. You might try adding a can of Seafoam to the gas tank to see if it runs better. If it does, then you got some bad gas.

Tester

3

thanks1

4

Your 1973 model car should have no problems with the 10% ethanol gasoline…

5

Caddyman,
They didn’t start designing fuel systems to handle oxy gas until 1976.

Tester

6

Non-oxy better, especially if gas stays in the tank for more than a couple weeks.

7

Thanks to all. On a related question, I’m learning about zinc content in oil, but it seems hard to come by. Is this a concern? Any recommendations?

8

The effects of truly bad gas would be much more extreme that a rough idle, like no idle what so ever. Bad gas is a often misused lable. I would look for normal tune up issues (and it is correct to use the term tune-up with a 1973), but just barely