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Thats why I asked. I ran full synthetic in all my diesel Super Duty’s, but dont know if I trust semi synthetic in a twin turbo “high output” V6The stuff my dealer puts in by default (semi) is good enough for me......and recommended by Ford.
To me, its kinda like buying an extended warranty. I never buy those either. But, if it helps you to sleep better......Thats why I asked. I ran full synthetic in all my diesel Super Duty’s, but dont know if I trust semi synthetic in a twin turbo “high output” V6