What is algorithm to calculate oil change?

[CVN 80]

So I get in my 2023 Mach 1 yesterday to get it out of its winter hibernation. The Change Oil message came on. What is the algorithm used to determine oil change? The car has 1500 miles but I have had it just over a year. So I can see that there may be a time component to calculating the oil change duration. It certainly can't be milage. The car is store in a heated garage during winter (radiant floor heat system is nice). Unfortunately work keeps me from home a lot to enjoy the toys. Thanks.

I do 10,000 miles on a load of Mobil 1 and just reset the Trip 2 counter to 0. Whatever time of year it happens to be is when it gets changed. Mind you, I'm on my first oil change right now.

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[320guy]

Thanks all. I will make an appointment for an oil change. Now to prepare myself for the typewriter tick everyone gets after the first oil change. Lets see if that happens.

I don’t think your oil is bad. But I would run it up to 2,000-2500 miles before doing the first oil change.

Did mine at 2,500 miles at the dealership. Then at 7500 miles I did my second oil change. Then at 12,500 I changed to Amsoil. The car is close to 15,000 miles and there’s no typewriter tick or RPM rattle.

Enjoy your Mach

 

[AZ_Ryan]

Thanks all. I will make an appointment for an oil change. Now to prepare myself for the typewriter tick everyone gets after the first oil change. Lets see if that happens.

I had it before my first change and haven't noticed a difference after.

 

[Rael]

I no longer fear the typewriter tick. When I got it after my second oil change, I cured it with Liqui Moly Ceratec.

See https://www.mustang6g.com/forums/threads/is-this-the-tick-everyone-talks-about.190634/ Posts ##10 and 11

 

[Schuvwj]

What is algorithm to calculate oil change?

When it turns dark! Change it.

 

[Johnny maverick]

My reminder was on today as well. I just hit 1200 miles. It has to be on a once a year thing. It wasn't on 3 weeks ago when I pulled it out of storage (and then it snowed) and I just got it back out today. I'll do a change and get that factory oil out of it. I took delivery on 3 31 23.

 

[ChitownStang]

I will tell you that when I run E70 in the summer the oil monitor goes down twice as fast so it must notice the Viscosity change in the oil from E fuel

 

[engineermike]

I will tell you that when I run E70 in the summer the oil monitor goes down twice as fast so it must notice the Viscosity change in the oil from E fuel

I mentioned this in post 14. If yours is a flex tune then it accounts for inferred ethanol content in the oil life calculation and it's a 2:1 ratio at anything over E65.

 

[Keeffa]

So I get in my 2023 Mach 1 yesterday to get it out of its winter hibernation. The Change Oil message came on. What is the algorithm used to determine oil change? The car has 1500 miles but I have had it just over a year. So I can see that there may be a time component to calculating the oil change duration. It certainly can't be milage. The car is store in a heated garage during winter (radiant floor heat system is nice). Unfortunately work keeps me from home a lot to enjoy the toys. Thanks.

I say 10,000 klm or once a year.

 

[Cobra Jet]

I’ve posted this before, here it is again for those who maybe have never seen it regarding OLM operation and how it functions, per the shop manual:

The timer also counts down as the car sits. So for those wondering why their Oil Life Monitor is saying you need an oil change when you have only driven 500 miles since last oil change BUT the car has been in the garage for 6 months consecutively... The above is your answer.

 

[JOKER M1]

And just to add something I had seen posted somewhere, apparently the OLM ticks down 1.92% a week when not driving the car

 

[Noleftist]

I’ve talked to dealers, Ford Performance, Ford customer service and others. Do any of you know for a fact is the oil life monitor/OLM based on conventional oil or blended oil or Synthetic?
If I had to guess I would say it is based on blended, which means it’s approximately 90% conventional oil.
Knowing this, would it not be logical and factual to say if you’re using only full synthetic oil that you can actually go another third more before actually needing to change your oil, than what the OLM says?
I am open to facts.
Thank you.

 

[ChitownStang]

I’ve talked to dealers Ford Performance Ford customer service and others. Do any of you know for a fact is the real life monitor based on conventional oil or blended oil or Synthetic?
If I had to guess I would say it is based on blended, which means it’s approximately 90% conventional oil.
Knowing this, would it not be logical and factual to say if you’re using only full synthetic oil that you can actually go another third more before actually needing to change your oil than what the OLM says?
I am open to facts.
Thank you.

I think it’s accurately estimating time and oil viscosity.
Mine goes down really fast when I’m running e85 in the summer

 

[engineermike]

I would assume that it’s accurate for oils meeting the ford Wss spec for the oil. The ford spec oil is “synthetic blend”, but it should be noted that there’s really no such thing as an API SP “conventional” oil anyway. And most “synthetic” oils are really just cleaned up conventional oil anyway, so the distinction between the three is very fuzzy. I noticed just last week that pennzoil platinum 5w20, which meets the ford spec, says “15,000 mile protection guaranteed” on the jug. That’s a group 3+ “synthetic”, but interestingly their own pennzoil “full synthetic” 5w20, which is only group 3, states 10,000 miles on the bottle which sorta aligns with ford’s calculations.

Also note that things like time and learned ethanol content affect the calculated OCI and synthetic doesn’t really do any better with these factors than conventional.

 

[AZ_Ryan]

I’ve talked to dealers, Ford Performance, Ford customer service and others. Do any of you know for a fact is the oil life monitor/OLM based on conventional oil or blended oil or Synthetic?
If I had to guess I would say it is based on blended, which means it’s approximately 90% conventional oil.
Knowing this, would it not be logical and factual to say if you’re using only full synthetic oil that you can actually go another third more before actually needing to change your oil, than what the OLM says?
I am open to facts.
Thank you.

I think that's a perfectly reasonable assumption. In fact, it's been shown under testing that full synthetic have a much higher resistance to heat and friction break down than conventional oil.

I personally believe that unless you are beating on the car or still using conventional oil, there is no reason to change your oil every 3-5k miles. It's just a sales and marketing myth that's been beaten into everyone's brains over the years.

Also, the quality of your filter is a huge factor in extending mileage between changes.

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