I was at Kragen's buying a fuel filter & spark plugs (don't
know if I need a fuel injector too, for $109 for a 1988 300ZX), and I
asked the cashier how often I need to change the fuel filter.

He said it depends.  Whatever you do, don't put cheap gas in your car.
ARCO will gum up your car.  I said even if you have a gutless 4
cylinder car?  He said yeah.

I told him I got 4 years out of it before it started hesitating.
Putting that special stuff in my gas tank to clear out the injectors
didn't do a thing for it.

So how critical is putting cheap gas in your tank?  Is that a big deal
at all?

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        "In a world where more than 10 million americans live with cancer -- we believe unity is strength, knowledge is power, and attitude is everything!"
              -- Livestrong, by Lance Armstrong