Switching Oil
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Freshman User
Joined: Jan 2004
Posts: 33
Likes: 0
Switching Oil
2005 F250 6.0 I am currently using 15w40 Rotella changing every 5000 miles. Got 18000 miles on it now. Is it ok to use synthetic 5w40 Rotella in the winter and switch back to regular oil in the spring. Changing the oil every 5000 miles I see no need to stay with the synthetic all year round. Synthetic is twice the price.
Junior User
Joined: Dec 2004
Posts: 56
Likes: 0
From: TEXAS
from all the research I have done, you can switch from reg oil to syn and back without any problems. but the question is why? find an oil that you feel works for you and stick with it. I personally use mobil 1 15-50 full syn. No problems to date, just make sure the oil you switch to is recommended by ford.
Post Fiend
Joined: Apr 2004
Posts: 19,098
Likes: 8
From: Great State of Texas
Just so you know, Ford does not recommend specific brands of oils...dyno or syn. What they kinda, sorta mandate is the rating. CI-4+ and CI-4. With CI-4+ carrying the strongest recommendation for the 6.0.
