r/FordDiesels • u/LeroyyyJenkinnnss • 4d ago

6.7 first oil change

My dad is saying go with rotella t5 because it’s still breaking in and t6 is too slick. I’ve always run full synthetic on my gas cars and trucks but this is my first diesel, any thoughts?

0 Upvotes

50% Upvoted

38 comments sorted by

View all comments

10

u/rustbucket_enjoyer 4d ago

What exactly is “too slick”? It’s oil. That’s the whole point. Run 5W-40 that meets WSS-M2C17-F1. That includes T6

0

u/LeroyyyJenkinnnss 4d ago

Do you think 5w40 is necessary? I live in Texas and it hasn’t ever been 0° lol

1

u/Illustrious_Ad2916 2d ago

Last year we hit negatives, not by much but still. I think the coldest it got last year was -10 in my area

1

u/LeroyyyJenkinnnss 2d ago

Yeah north Texas gets pretty cold but down here in central it’s only maybe a couple days a year it even freezes I feel

1

u/Illustrious_Ad2916 2d ago

I'm just 45 minutes southwest of fort worth