Oil Change Interval

[fishinrich]

Change oil once a year or wait for the car's computer to reach 10% left before changing?

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[Skye]

It depends.

The Oil Life Monitor works in two ways:

- Time. The counter ticks down 1.97% each week, even if the car is sitting. This is to ensure the owner is reminded of an oil change once a year, with an anticipated 10,000 mi / 16,000 km service interval

- Operation. Given driving duration, RPM, engine temperature, etc., the algorithm determines the effects on the oil and adjusts the OLM accordingly. Driven hard enough, the OLM can tick down rapidly

At one extreme, the OLM will expire at the end of one year. At the other, the OLM will expire at the end of a weekend at the track.

I'd just watch the OLM, initially a few times a month to notice how quickly it is trending down. When the % is 10% or thereabouts, begin preparing for the next oil change. The vehicle will send the driver at least one pop-up message, when it thinks the next oil change is about 500 mi / 900 km out.

I usually change mine about 10% or less left.

Reset the OLM once complete. For those scheduling service at a dealer or shop, confirm the tech has reset the OLM or DIY via the menus afterwards.

 

[Alan Applegate]

One would assume the algorithm for turbo and blower vehicles is different than non ones? Whatever, but my Eco-Boost is due in ≈400 miles (2,650 on the OD, and 14+ months old) for its second oil change. Maintenance is cheap compared to replacement!

 

[Skye]

One would assume the algorithm for turbo and blower vehicles is different than non ones?

I'd think so.

In the variable of time (one year), I'd say no, it would not be different. But with respect to engine operation, I could see some differences, the algorithm being tailored to that engine.

The engineers at Ford built the OLM. With a stock car, I think it works fine. But...

- People operating in unique or extreme environments, check the owners manual

- People with modified engines and drivetrains, discuss maintenance with the company providing the parts, the builder making those changes or people with experience in making those mods

 

[Stanzi]

Personally I’m old school and I may not need it but it’s incredibly cheap peace of mind - I change all my cars every 4-5000 with full synthetic.

Do I spend a couple dollars a year more than I need to? You bet. Do I care? Nope- it’s my money and it makes me feel better lol.

 

[robvas]

How many miles in that year?

I wouldn't bother changing it in a year for no reason other than time. I'd stick to 5-6k depending on your driving.

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