Change today or wait for OLM?

BIC

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My 90-year old father-in-law has a 2017 Lincoln Continental with the twin-turbo, 400HP, 3.0-liter GTDI V6 engine. Bought used from Lincoln dealer In September 2020. Per invoice, dealer changed oil in September at 33,770 with 6 quarts of V0-5W30, part # SYN-BLE 004768. I'm surprised they didn't use full synthetic in the high-performance engine.

In October, they sent him a letter for a free oil change today (7/29/21). Current mileage is 35,982. That's all of 2,212 miles since last oil change. Not sure if does a lot of short trips. Probably. I'm sure there's an OLM, but he probably wouldn't be able to find it and I can't see the car today.

I do see in the manual that there is a OLM warning light at 10% and again at 0%. Presumably, he hasn't seen those. The manual says the OLM is one-year or 10,000 miles. Also, the manual says syn-blend, full syn optional.

Should we go today or reschedule when OLM hits 10% or something else? Should we switch to full-syn? If so, should we do that now regardless of OLM? Thanks.
 
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If the free oil change offer expires today, then I'd be inclined to go in and take advantage of it. Or call them and ask if they'll give you a raincheck and allow you to get a free oil change in September.

I'm sure the owner's manual calls for an oil that meets some particular Ford spec (WSS-M2C946-B1 ?). As long as the oil meets that spec, you should be fine, regardless if full syn or blend.
 
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I’d change it and go with 5w30 MC synblend again. Maybe shorten interval to every 6 months/5k miles. Although miles aren’t a factor here.
 

BIC

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It's been 10 months. One-year will be mid-September. No expiration on free oil change.
 
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Like Q.P. said. Take the free oil change then do yearly changes. On my F150 I do about the same miles-per-year as your father-in-law and change the oil every 2 years.
 
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Modern Fords are frequently 1-year or 10,000 miles for an oil change so in his case, the 1-year timer applies.

I'm surprised they didn't use full synthetic in the high-performance engine.

I do see in the manual that there is a OLM warning light at 10% and again at 0%. Presumably, he hasn't seen those. The manual says the OLM is one-year or 10,000 miles. Also, the manual says syn-blend, full syn optional.
Why would a dealer use an oil that's not necessary ? As you say, the manual only recommends a synthetic blend.

The instrument cluster should have a menu that shows the exact oil life %, probably under Information > System check (or status).
 
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With that engine, I would take advantage of the oil change. But, after that, I would change every year or every 5000 miles with full syn. If it did mostly/only short trip-ing, I would back that down to every year or 3000 miles; but that's just me.
 
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