Oil Question
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Freshman User
Joined: May 2013
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Oil Question
I currently run amsoil in my truck but I am thinking of switching to rotella. The reasoning is I use rotella in my equipment and just makes more sense to buy that in bulk instead of ordering amsoil everytime I need to do an oil change. Is there really that big of a difference? And it is bad to go from synthetic to reg. oil? I still change my oil between 3-5k with the amsoil. Any thoughts info would be appreciated.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
Going from syn. to conventional oil and vice-versa will not hurt anything. Rotella T, T-5 and T-6 are all good oils for the 6.0 and your oil change intervals are good. Make sure that you're using OEM filters only.
Logistics Pro
Joined: Dec 2004
Posts: 4,138
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From: South Weber, Utah
Is there such a thing as diesel rated 5W-30 engine oil?
Logistics Pro
Joined: Dec 2004
Posts: 4,138
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From: South Weber, Utah
<p>You are correct I had never heard of it so i did some searching and found it, if you have the money amsoil has it for 11 bucks a quart.</p>
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Cargo Master
Joined: Oct 2011
Posts: 2,958
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From: Denver, NC
Rotella T6 full Syn 
I have always heard switching from Dino oil to Synthetic is just fine but DONT ever switch back from Full Syn to Dino Oil
I'll also say this after i switched from Rotella's Dino Oil to the T6 (due to recommendations from people here) my truck runs smoother & injectors are quieter (especially in cooler temp's)........
I have always heard switching from Dino oil to Synthetic is just fine but DONT ever switch back from Full Syn to Dino Oil
I'll also say this after i switched from Rotella's Dino Oil to the T6 (due to recommendations from people here) my truck runs smoother & injectors are quieter (especially in cooler temp's)........
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Senior User
Joined: Aug 2010
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From: Duncan, OK
Holy guacamole $11 a quart... I'll stick with the T-6
9 ECHO 1
Joined: Aug 2009
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From: Missouri
The rumor mill churned out the "Synthetic oil causes leaks" rumor because some specific types of seals used in the 70s and 80s dont hold up to new synthetic. Older vehicles that used these seals with these materials (cant recall what kind of material it was in the seals right now), would cause the seals to break down, however, I dont believe you can buy these material seals anymore, and a replacement seal wouldnt have that issue.
9 ECHO 1
Joined: Aug 2009
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From: Missouri
AMSOIL is good much longer than 5k, but some people choose to stick to the 5k OEM recommendation.
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Brian
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Freshman User
Joined: May 2013
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I was running 15-40 amsoil heavy duty full syn. I was a dealer and it wasnt to bad on the wallet. I quit being a dealer and didnt really want anything to do with amsoil anymore. I switched to Rotella. I use it in all my equipment so it makes it easier buying it in bulk. Sorry for the really late reply.