Maintenance Intervals - Spark Plugs, Wires and Fuel Filter

....
2002 Monte Carlo 3.4L but more of a generic question
Owners manual says spark plugs are good for 100K.... Platinum plugs...
I just replaced mine at 57K, they looked not too bad, a little worn. But
100K is probably stretching it.
What would be a conservative service interval for replacing spark plugs??? ( 2/3's highway and 1/3 city driving).
What would be a conservative service interval for replacing the WIRES as a scheduled maintenance item ??? Do wires last longer than today's spark plugs, or should they both be changed about the same time ??
Finally, the Fuel Filter..... Haynes says every 30,000 miles or 24 months as a general rule applying to several engines. (3.1, 3.4, 3.8) Alldata, referring specifically to a 3.4L says there is not a recommended service interval but to replace only when fuel delivery starts to be restricted.
What's your take on replacing the inline canister type fuel filter under a conservative maintenance schedule ?? .
Thanks in advance !!
Peter
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If one wants to do the proper PREVENTIVE maintenance, plugs, wires, gas filters, brake fluid, belts and coolant would be best be changed every three years, or 75K WOF. BEFORE they become a problem that could leave one sitting on the side of the road. Oil and filter at 5,000 miles, or six months, WOF. Tires after 2/3 the orginal tread depth has worn away
<Peter> wrote in message

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<Peter> wrote in message

Not really. I replaced mine at 120,000 and it ran the same. My last car was changed at 85,000 and went to the graveyard with the second set still in there performing well.

Five or six years. They can deteriorate no matter how many miles. Always replace them when you do the plugs since you did half the labor anyway and there is a good chance you'll ruin one taking it off the plug.

I replace the filter in my '91 when the tank rusted out and had to be replaced at 100k. My '97 was never changed in 87,000, my '01 was changed at about 90,000
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<Peter> wrote in message

Not one bit Peter. Today's engines will easily go 100,000 miles on a set of plugs.

Change them at the same time.

I agree with changing a fuel filter when restrictions become apparent.
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