[quote author=dcaranci link=topic=171918.msg3645569#msg3645569 date=1273005854]
Well I don't want to be argumentative, but using that logic maybe I should be changing my oil every week or every 100kms then? Yes, I'm being sarcastic but I think you're missing my point.
Yes, I agree $40 or whatever it costs is cheap insurance but I also know that modern powertrains and modern oils (even conventional ones) will, under normal driving conditions, last beyond 5000kms.
All I want to know is simply this... based on NORMAL driving conditions and using CONVENTIONAL oil, what is the recomended oil change interval?
Oh, and by the way I found that MOST 5W20 name-brand conventional oil DOES meet the Ford spec, or at least it says it does on the bottle. I verified Penzoil, Castrol, and Quaker State before I decided it's not worth checking more.
I'm now trying to get an answer from Ford as well, but they are taking a while to get back to me.
Simply put, Ford does not
differentiate between Synthetic, Synthetic Blend and Conventional oils in their Scheduled Maintenance recommendations.
Therefore, any 5W-20 oil that meets the following Ford Specs (WSS-M2C930-A with API Certification Mark) is good for the Normal and Severe Duty OCI (Oil Change Interval) Schedules as printed in our "Ford Scheduled Maintenance Guides". In the U.S., that OCI is 6 months/7,500 miles for "Normal Service", and 6 months/5,000 miles for "Severe Duty". Some quick math tells me the metric conversions would be 12,000 km "Normal Service and 8,000 km Severe Duty.
Ignore the 3,000 mile(or equivalent kilometer conversion) OCI's that Dealer will try to push (unless you want to follow it by choice). They are outdated and Dealers only promote them to make more Service profit. Follow the Ford Scheduled Maintenance Guide that can be found here: www.fleet.ford.com/maintenance/owners_manuals/default.asp
Fill in the drop-downs and click "Submit". Then click on "Scheduled Maintenance Guide". Be sure to follow the pages listing the Maintenance Schedule for "Passenger Cars and CUV's", not the one for "Trucks, Vans, and SUV's. And read the descriptions of what constitutes "Normal" and "Severe" service/duty, then decide which schedule best fits your car.
Now, to avoid me getting involved in a debate: I do not know if there are any conventional oils that "meet and/or exceed" the Ford specification I stated above. "dcaranci" says he found three that state they do on the bottle.
If they meet/exceed that Ford spec, then as far as Ford is concerned, the OCI is still the same as a Synth or Synth blend. Simply put, same spec, same OCI. I am not making a judgment or expressing an opinion as to whether anyone should or "do this" or "not do that". I am only presenting the Ford Service Policy. If it meets the Ford "WSS-M2C930-A with API Certification Mark" spec, then the regular OCI's stand, whether it is Synthetic, Synthetic Blend or Conventional.
Just on a side note: Ford first upped the Normal Service OCI's to 6 months/7,500 miles with the 3.5l in the 2007 model year MKZ (again 6 months/5,000 Severe Duty). For the 2008 model year, the OCI was upped for the rest of the Fusion/Milan and other lineups.
Hopefully, this information will be helpful to some. Of course, everyone is free to use an OCI that they are comfortable with (within Ford's Warranty restrictions, of course).
Whatever everyone decides to do, good luck.
PS - D, I know this is more information than you asked for, but I figured I would just put it all out there at once. In this way, it may help answer the questions of someone else later.