Changing oil Full synthetic? half and half? - Ford Mustang Forum
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post #1 of 17 (permalink) Old 05-31-2011 Thread Starter
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Changing oil Full synthetic? half and half?

For my 2003 stang gt would full synthetic be appropriate to use it has 45k on it
So i would like to know what everyone else uses?????
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post #2 of 17 (permalink) Old 05-31-2011
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I use 5w-30 mobil 1 for my car,no problems ever with the car.

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post #3 of 17 (permalink) Old 05-31-2011
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5W20 Dyno Oil.......

If you change it often, there's really no advantage to running synthetic.

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post #4 of 17 (permalink) Old 05-31-2011
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Quote:
Originally Posted by BRENSTANG03 View Post
I use 5w-30 mobil 1 for my car,no problems ever with the car.
Same here, although I recently switched to Pennzoil Platinum. Motorcraft filter, change it every 5K.


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post #5 of 17 (permalink) Old 05-31-2011
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Mobil 1 5W-30. Mobil 1 is the factory fill in many supercars far more expensive than anything we will ever own.

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post #6 of 17 (permalink) Old 05-31-2011
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Motorcraft synthetic blend, 5000 miles, just as the factory recommends.
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post #7 of 17 (permalink) Old 05-31-2011
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mobil-1 5w 20 full synthetic.

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post #8 of 17 (permalink) Old 06-01-2011
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Mobil one here as well, though I think those using Motorcraft have zilch to worry about.

The thing that bugs me about "synthetic blend" oils is that we don't know the ratio of the "blend"...
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post #9 of 17 (permalink) Old 06-01-2011 Thread Starter
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Thnx a lot everyone
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Asking what oil everyone uses here is like asking what toilet paper you prefer. You're going to pretty much hear everything.

I didn't put the brand in mine, I typically use Castrol or Mobil 1, depends on what's on sale at the time.

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Castrol 5/30 Synth here.

Advantages of Synth;

1. most are 35% synth + 35% dyno + 30% synth additives, so you are using more synthetic compounds (less dyno oil) so it is more "eco" than regular oil.
2. You can extend your oil change to 20k miles, so price ratio is almost the same as dyno oil.
3. Better lubrication properties
4. Better fuel economy

I know it is a pain to pay that much more, but in reality in the long run it is better for your car, environment and wallet.

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Quote:
Originally Posted by GTRaptor View Post
Castrol 5/30 Synth here.

Advantages of Synth;

1. most are 35% synth + 35% dyno + 30% synth additives, so you are using more synthetic compounds (less dyno oil) so it is more "eco" than regular oil.
2. You can extend your oil change to 20k miles, so price ratio is almost the same as dyno oil.
3. Better lubrication properties
4. Better fuel economy

I know it is a pain to pay that much more, but in reality in the long run it is better for your car, environment and wallet.
You say 2oK mi? That's alot. We're running 5w30 Royal Purple but not sure if we should keep using it. Heck, we were about to change the oil, it's been 3k miles since last change. How often should we change it if we stay w Royal Purple? Can you even switch to conventional or part synthetic? hate to throw away money.
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Quote:
Originally Posted by Bullitt5339 View Post
5W20 Dyno Oil.......

If you change it often, there's really no advantage to running synthetic.
So if we're running Royal Purple synth how often should we change it compared to conventional or synth blend?
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With 45k you should have no problem changing to a syn oil but.... I had a 98 z28 with 155k and all people did was tell me use syn use syn. So one day I went out and got Mobil 1. After that the car burned oil at a rapid rate. I never had that problem with Castrol GTX. The problem is with older cars seals are weak and brittle and oil can leak threw them, Or there is some sludge holding crap in place hiding a leak. Bottom line is if there is a weak spot a syn oil will find it. That camaro is gone now and now since I got my 04 GT with 48k nothing But Castrol goes in it because I'm not risking that crap again. 3k changes or every 3months is what I do. Do that and it will run well past 200k. I think syn Oils are good if the car had it since new. Woaahh old thread just realized that!!!

2004 Mustang GT- 100 Shot NX, BBK cold air intake, Steeda Pulleys, UPR Catted X-Pipe, SLP LM1s, Brenspeed tuned. Many more to come
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Quote:
Originally Posted by jam_rac View Post
You say 2oK mi? That's alot. We're running 5w30 Royal Purple but not sure if we should keep using it. Heck, we were about to change the oil, it's been 3k miles since last change. How often should we change it if we stay w Royal Purple? Can you even switch to conventional or part synthetic? hate to throw away money.
20k miles yeah id like to see his engine. Even with a 20k change the oil filter will still need to be changed because they only last 5k or so. If you are changing 3k like I am just use conventional oil and it will be fine. I never had a problem. Your wasting your money

2004 Mustang GT- 100 Shot NX, BBK cold air intake, Steeda Pulleys, UPR Catted X-Pipe, SLP LM1s, Brenspeed tuned. Many more to come
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