Switching to Synthetic??? - Ford Powerstroke Diesel Forum
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Old 02-16-2008, 01:07 PM
Compression Ignition Addict

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Exclamation Switching to Synthetic???

Ok i have nerver used any synthetic oils in anything. I was thinking bout changing my engine and tranny to synthetic. Switching from regular oil to synthetic is there any ways i should go about changing them? is there a certain procedure to follow when switching oils? Have no clue or should i just stay with what i use now. engine i run Delo 400 and tranny when i changed the filter i used coastal atf. Let me know what yall think!
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Old 02-16-2008, 01:23 PM
John Wood Nut Swinger


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You change the engine oil as normal.

The transmission you have to drain the torque convertor or flush the convertor. Look here for a good write-up: 4R100/E4OD Trans Flush Procedure - Powerstroke Nation

FWIW, I have been running Amsoil heavy duty diesel and marine oil for the last 150,000 miles. Oil analasys has always come back lower than normal averages.

I just today took off my dual remote/bypass and switched back to Delo 400. The Amsoil will hold up to a single HPOP truck for 18-20K miles without any problems. Over half those miles are towing. After I switched to my twin HPOP's my oil will only last 10-11K. I can get 5K out of dino oil so I did not find it a financial advantage to run Amsoil in my truck any longer.
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