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Oil Change Light
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Thread: Oil Change Light

  1. #1
    Member maxb's Avatar
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    Oil Change Light

    My light just came on the other day and it got me wondering. How does the light know when to come on? Engine hours, mileage, or does the computer test the oil in some way.
    Respectfully,
    Max


    ________________________________________
    2015 FIAT 500 Abarth ,Nero Puro, Nero/Rosso Leather, Manual
    1964 Volkswagen Beetle 1600DP

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    Senior Member bryanintowson's Avatar
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    It is, I believe based on a combination of miles and revs. Early build 2012's and late model Euro spec cars have a viscosity sensor in the oil pan but this was done away with in later cars. I have a 2012 that has a sensor, it's not connected to anything and it can fail as mine did and cause some electrical wonkyness.

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    Senior Member Trunkout's Avatar
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    Just to know it's NOT just based on mileage (like pretty much every previous car I've owned) makes me happy!
    2013 Rosso Abarth 5spd Bianco 17s
    SOLD August 2018 BUT got company car

  4. #4
    Amministratore Fiat500USA's Avatar
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    Lots of info on the site on this. I grabbed a couple of quotes from threads on the topic:

    Quote Originally Posted by Chris View Post
    Fiat of Brookdale (My Dealer) posted this to their facebook page. FYI:

    There have been discussions about feedback from customers and dealers about the Automatic Oil Change Message. The software works the same way it does in Chrysler products, but depending on the model year, it may be calibrated differently for the mileage intervals. The software monitors the way the vehicle is driven for a period to decide whether it is being driven in low or high duty cycle. This period is neither determined strictly on time or mileage. Theres a formula which can take anywhere from 0 to 500 miles to determine the duty cycle.

    If it is determined that the vehicle is being driven in a high duty cycle, it adds 3,500 miles from the decision point before turning on the change oil indicator. If it is determined to be low duty cycle, it adds 7,500 miles from the decision point.

    If the engine control module is re-programmed, the values used to calculate this is lost, so the first indication will come on 3,500 miles from that point. As long as theres no loss in battery power or re-programming, the software will again, go through the process to determine the duty cycle.

    Below is a copy/paste of an early owners manual. The production document may not be exactly the same, but the 8,000 mile interval should be not to exceed rather than change every 8,000 miles. The 2011 Dodge Charger owners manual also reads do not exceed 8,000 miles under any circumstance.

    We may need to rewrite the owners manual to be more clear. Just so you know how the system is setup, you can expect to see the oil change message come up either between 3,500 to 4,000 miles or 7,500 to 8,000 miles.

    Even though the drive route may be the same, as Jeeps with V6 or V8 engine operate at a much lower engine load than the 1.4L engine in the Fiat 500. You may have one vehicle set a low duty cycle and another set a high duty cycle trigger for the oil change indicator, because the engine is working in different load conditions on the same drive.

    The owners manual states that you should change your oil within 500 miles of when the message comes on, so you dont have to stop the car and change the oil right away.
    Here is how the 2012 System works:

    Quote Originally Posted by Fiat500USA View Post

    The oil change indicator system will remind you that it is time to take your vehicle in for scheduled maintenance.

    Based on engine operation conditions the oil change indicator message will illuminate, this means that service is required for your vehicle. Have your vehicle serviced as soon as possible, within the next 500 miles (805 km).


    NOTE:
    • The oil change indicator message will not monitor the time since the last oil change. Change your vehicles oil if it has been 6 months since your last oil change even if the oil change indicator message is NOT illuminated.
    • Change your engine oil more often if you drive your vehicle off-road for an extended period of time.
    • Under no circumstances should oil change intervals exceed 8,000 miles (13,000 km) or 6 months, whichever comes first

    .


    OIL CHANGE INDICATOR - RESET
    The vehicle is equipped with an engine oil change indicator system. The Oil Change Required message will flash in the EVIC display for approximately 10 seconds after a single chime has sounded to indicate the next scheduled oil change interval. The engine oil change indicator system is duty cycle based, which means the engine oil change interval may fluctuate dependent upon your personal driving style.

    Unless reset, this message will continue to display each time you turn the ignition switch to the ON/RUN position. To turn off the message temporarily, press and release the Menu button. To reset the oil change indicator system (after performing the scheduled maintenance) perform the following procedure:

    Turn the ignition switch to the ON position (Do not start the engine).
    Fully depress the accelerator pedal slowly three times within 10 seconds.
    Turn the ignition switch to the LOCK position.

    ===========================================


    How the 2013 - 2015 system works:



    OIL CHANGE INDICATOR SYSTEM


    Your vehicle is equipped with an automatic oil change indicator system. The oil change indicator system will remind you that it is time to take your vehicle in for scheduled maintenance. Based on engine operation conditions, the oil change indicator message will illuminate. This means that service is required for your vehicle. Operating conditions such as frequent short-trips, trailer tow, extremely hot or cold ambient temperatures, and E85 fuel usage will influence when the Change Oil message is displayed. Severe operating conditions can cause the change oil message to illuminate as early as 3,500 miles (5,600 km) since last reset. Have your vehicle serviced as soon as possible, within the next 500 miles (805 km). Your authorized dealer will reset the oil change indicator message after completing the scheduled oil change. If a scheduled oil change is performed by someone other than your authorized dealer, the message can be reset by referring to the steps described under Electronic Vehicle Information Center (EVIC) in Understanding Your Instrument Panel for further information.


    NOTE: Under no circumstances should oil change intervals exceed 10,000 miles (16 000 km) or twelve months, whichever comes first.
    Severe Duty All Models


    • Change Engine Oil at 4000 miles (6,500 km) if the vehicle is operated in a dusty and off road environment. This type of vehicle use is considered Severe Duty.



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    Member user name's Avatar
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    a question that's been bugging me for a while. i know how to reset the indicator light. now let's say that i change the oil before the light comes on to remind me. if i do the reset procedure, will it know to reset my oil life cycle or does the reset procedure only work when the reminder light is lit?

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    Quote Originally Posted by user name View Post
    a question that's been bugging me for a while. i know how to reset the indicator light. now let's say that i change the oil before the light comes on to remind me. if i do the reset procedure, will it know to reset my oil life cycle or does the reset procedure only work when the reminder light is lit?

    You have to manually reset it when doing an OC.

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    Quote Originally Posted by gincar96 View Post
    You have to manually reset it when doing an OC.
    maybe my question wasn't clear. does the reset procedure work only when the light is on or does it work when the reminder light is not yet lit (i.e. when doing an early oil change)?

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    Quote Originally Posted by user name View Post
    maybe my question wasn't clear. does the reset procedure work only when the light is on or does it work when the reminder light is not yet lit (i.e. when doing an early oil change)?
    It doesn't matter. You can reset the meter at any time you want. The manual makes it pretty clear this can be done whenever,,
    Last edited by gincar96; 10-29-2015 at 07:41 PM.

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  10. #9
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    Quote Originally Posted by gincar96 View Post
    It doesn't matter. You can reset the meter at any time you want. The manual makes it pretty clear this can be done whenever,,
    from the 2013 abarth manual:

    Change Engine Oil Indicator System
    Change Engine Oil
    Your vehicle is equipped with an engine oil change
    indicator system. The “Change Engine Oil” message will
    flash in the EVIC display for approximately 10 seconds
    after a single chime has sounded to indicate the next
    scheduled oil change interval. The engine oil change
    indicator system is duty cycle based, which means the
    engine oil change interval may fluctuate, dependent
    upon your personal driving style.
    Unless reset, this message will continue to display each
    time you turn the ignition switch to the ON/RUN
    position. To turn off the message temporarily, press and
    release the
    SET ESC
    button. To reset the oil change
    indicator system (after performing the scheduled main-
    tenance), refer to the following procedure.
    1. Turn the ignition switch to the ON position.(Do not
    start the engine.)
    2. Fully depress the accelerator pedal slowly, three times
    within 10 seconds.
    3. Turn the ignition switch to the OFF/LOCK position.


    maybe you're right. and maybe i'm dense but the text in the manual isn't that cut and dry in my opinion. i did read that before you mentioned it and it's still unclear to me. it surely doesn't say that the reset procedure can be performed "whenever". it states "after performing the scheduled maintenance." i don't know that it implies that a scheduled maintenance can be done before it's scheduled.
    Last edited by user name; 10-29-2015 at 10:36 PM.

  11. #10
    Chief Car Looker Upperer Lifetime Member Andree's Avatar
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    Yes, it can be and was reset on my 2013 Lounge when I had it in for it's oil change, just before I was moving earlier this year. The oil change light had not come on, but it was time as I'd never had an oil change on the car and it had about 2,500 miles or so on it. I noticed my mechanic resetting the oil change light myself while we were chatting about the spare tire I was having put on.

    So, yes, a scheduled maintenance thing like the oil change can be done before the light comes on, and can be reset at that time.

    I do not know if one would want to reset the oil change light without having done the oil change, that would serve no purpose other than to perhaps damage the vehicle if it's oil wasn't changed. (edit: the resetting wouldn't damage the car, but might not alert the driver to when it truly did need changing, and that could damage the car)

    For people like myself, who do not drive much, if I went by miles, I'd never need an oil change. I've had my car since Dec 2012 and still haven't hit 4,000 miles. Most of the miles on my car, almost 1,000, were put on during my move.

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