If you don't put 5,000 miles on your truck and it uses a synthetic blend, can you wait a year before changing it if hasn't been run in rough conditions. My service advisor told me I could go a year. Most say 5,000/6mos or whatever comes first. Your thoughts please.

 

Depends ......
And the year, model, cab, trim, engine, wheelbase, _x4 drive, etc. of your F-150 is

HINT/TIP: Put your vehicle information in your signature -OR- provide it in your posting(s).
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I honestly would not let oil stay in my engine for a year, but maybe I'm just paranoid

 

Every 5K with filter for me.

 

The cost of a simple oil change for insurance is worth it

 

Exactly and that service writer will most likely, down the road, deny his warranty repair because the oil appears to have never been changed properly!

 

Every 5k whether it needs it or not, just did my 3rd oil/filter change this past weekend Mobile 1 full synthetic. Truck is 5 years old.
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It keeps in the CC. The 98 went 8 years on an oil change. Began driving it more often , put another 100,000 on it. At 350,000 miles now...that engine still doesn't use oil between changes, it's a 5four fluke lol. Kids using the truck now changing every 3,000. Strictly the Blend and FL820s's fer life. Never go by time, unless your short tripping or idling the dang thing every few months lol. - Miles matter for the crank. It's air tight...tight enough!

 

With synthetic I'd not worry too much about waiting a full year even if I drove 5000 miles or less.

 

If you're using a good quality national branded oil, one a year will be fine. I am speaking in terms of the oil maintaining its intended qualities to protect your engine. You didn't say anything about your driving habits. If you do a lot of short runs or extenuated idling, you will need to change the oil more frequently. Short runs, you will start to build moisture in the oil from condensation. The engine oil will not get up to full operating temp and evaporate the water. Extended idling will cause excessive fuel dilution, reducing viscosity and depleting/diluting additives.