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I have a 97' f250 7.3l and I have always used conventional motor oil but I was wondering if I should switch to synthetic because I've heard it's better. My only concern is my truck has roughly 310xxx miles and could I switch with this many miles? And is Rotella synthetic a good choice?
 

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I switched to the T6 5w40 synthetic and my trucks like it alot better then the standard 15W40 Rotella...
 
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ive been runnin Amsoil 5w-40 in my 2006 since 30k miles, now have 160k miles and runnin strong !!!
 
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synthetic wont loosen anything up.

most oils have the same amount of detergents to prevent sludge buildup.

you can switch to synthetic whenever you want to regardless of miles.

rotella t6 is a full synthetic, t5 is conventional.


ive used rotella t6 and delo 400 full synthetic. I like both and the delo synthetic is cheaper than rotella at walmart.
 
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