synthetic oil question

[68GEETEE]

I have an '07 GT with just 4100 miles, it sits a lot, so far have changed the oil twice. Thinking about switching to synthetic oil , is this a worthwhile move?

Also, if I do switch over, I assume there will still be some residual conventional oil in the engine, how does this mix with the synthetic? Do I have to change it several times in a short period to fully get the old oil completely gone?

 

[rwood126]

It's a good idea to do it early. As far as the oil mixing goes...it doesn't matter .
It would be almost like a synthetic blend. But after a few oil changes it will be all out.

And yes if you ever want to go back to conventional oil you can it will not hurt.

 

[walter]

Just change the oil. The Synthetic will last longer then the conventional so it's better if you let the car sit a lot to have it in the crankcase. Don't worry about mixing and draining you'll do fine with a simple change.

 

['69 Hardtop]

Correct me if I am wrong, but I was under the impression that Ford uses synthetic from the factory on the '05 and up mustangs.

 

[walter]

Correct me if I am wrong, but I was under the impression that Ford uses synthetic from the factory on the '05 and up mustangs.

The Motorcraft oil Ford uses is a synthetic blend.

 

[68GEETEE]

thanks for your input.