[BrookieDragon]

Cruse2012- If using fully synth, can oil change be delayed after "change soon" light?

So my wife, gullible little thing, stopped by midas at my request to get a normal oil change. They of course told her "oh no no, you need this super fully synthetic diamond version ultra pristine oil for your car." yadda yadda. She totally bit and ended up walking out of there with a $100 oil change.


This was probably about 6-8 months ago. Now the "change oil soon" light has come on again. I was always told that you could go much longer, even up to a year, with fully synthetic (assuming they actually even gave her the oil she paid for).


My question is, does the "change oil" light actually calculate for the difference of synthetics and regular oil? Or is it just using the same calculation of rotations and all as it would for regular oil?
I was about the put in mobil 1 extended performance (15000 miles / 1 year), but afraid the change oil light will come on every 6 months.

 

[BrookieDragon]

Didn't the 11-12 cruzes have that ECU update to make the OLM a little more accurate by shortening the lifespan on it? If so and he doesn't have that update, it could be that they are quite possibly way over on oil life (because you know Midas probably used a basic synth oil, and not AMSOIL, and NO shop ever uses a synthetic filter, it's always a basic filter)

Thanks for all the quick replies guys. Honestly I have no clue about the ECU update. I inherited the car last year. As the previous owner is not with us, I can't find out if it was done... though knowing him, it probably wasn't.

The car was only driven probably about 6000 miles at most. I hear you about the filter though. I was going to buy a synthetic filter and fully synth oil, a combo that advertises one year, and give that a shot.

I guess my big question is, if after I change it this time, should I expect the warning light to change oil to come back on again after another 5k miles or so? Or will it measure differences with the fully synth oil and extend the time before warning lights?