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Old 12-23-2003, 11:08 AM   #1
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Snyth. oil ? NOT same ole ?

If you swap over to full synthetic oil how many miles can you go before changing the oil?


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Old 12-23-2003, 11:17 AM   #2
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You don't want to open this can of worms....do ya...?

I believe most will say 4K-6K miles depending on your driving habits and the type of synthetic oil you use. Not all "synthetic oil" is true synthetic these days.
Mobil1 doesn't recommend a interval between oil changes but Amsoil states 7500 miles for their 7500 series synthetic oil. They even have some that recommend 10K miles between oil changes.
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Old 12-23-2003, 12:29 PM   #3
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Ford says 5000 miles between oil changes on the fOCUS and I believe you will jeopardize your warranty if you go beyond that. I would think the engine maker can make more specific recommendations about the life of the engine oil than the oil maker possibly can.
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Old 12-23-2003, 12:55 PM   #4
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I use Durablend 5w-30 by Valvoline. (I change oil/filter every 3000)
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Old 12-23-2003, 02:22 PM   #5
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Everyone has their own ideas on this including Ford and the oil manufacturers. I use Red Line 5W-20 ( a 100% true synthetic) and change oil and filter every 6,000. Personally,
I wouldn't go more than that regardless of what oil you use.

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Old 12-24-2003, 08:59 AM   #6
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The thing about systhetic oil is that the base oils do not deteriorate, so in theory, they could last forever, HOWEVER, sythetics do have an additive package which becomes used up, also filters do need to be changed.
As Microtonal said this subject is a can of worms. It is kinda like discussing religion, with people adhereing stongly to differerent positions.
Personally, I use Torco SR-1 5w-20 full synthetic and will change it @ 5K. I'm fairly confident I could go longer between but will error on the side of caution, if in error.
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Old 12-24-2003, 09:40 AM   #7
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I use Mobil 1 right now and still change it every 2500 miles to keep everything clean, however Im going to switch back to Motorcraft 5w-20 soon becaue I dont really see any point or better performance out of the Mobil 1
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Old 12-24-2003, 10:20 AM   #8
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There is no void of your warranty by extended periods between drain periods unless Ford proves that the oil was the fault of the problem. Changing your own oil does not void your warranty, using different oil does not void your warranty. I keep seeing all these people who come in here and say...don't sneeze in your car, the sudden added air pressure in the cabin will void your warranty. This isn't a china closet, it is a car, a mechanical device with given tolerances. If you believe that the tolerances are really that finicky then you better not drive your vehicle in the rain, snow, sleet, hail, humid conditions, cold conditions, ice, or dusty conditions. Ford cannot and will not claim that it was your oil or its period of use that has voided your warranty, and if they do, they are full of crap. Obvious extremes being excluded here, if you run without enough oil you will do damage. This would mean no warranty repair for you. But if your oil is perfectly functional and some dealer tries to give you this crap, tell them to shove it, and send your oil out for API testing, if it comes back good, they can eat their words. I hate people who tiptoe around the warranty like it is some sort of holy bible. It is there to protect the CONSUMER and their purchase. Not to restrict the consumer from using their vehicle.
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Old 12-24-2003, 10:50 AM   #9
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Quote:
Originally posted by EuroZX3Focus
I use Mobil 1 right now and still change it every 2500 miles to keep everything clean, however Im going to switch back to Motorcraft 5w-20 soon becaue I dont really see any point or better performance out of the Mobil 1
I am u sing motorcraft synthetic blend 5w-20 and i think i am going to stick with that.
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Old 12-24-2003, 10:52 AM   #10
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Motorcraft blend 5w-20. $1.60 a quart at Walmart.
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