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Old 02-08-2012, 10:42 AM
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oil question

Last time i changed my oil i used the valvoline extreme blue 5W-40. I was thinking of switching to rotella T6 5W-40 this time because it is cheaper than the extreme blue. I have 2 quarts of the extreme blue left from the last oil change. Do you think it would be ok if i buy 3 gallons of T6 and use the other 2 quarts of the extreme blue or should i not mix them? Thanks for any advice
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Old 02-08-2012, 11:03 AM
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im no expert on the topic, but if I was driving my 7.3 still sure I would mix all kinds of stuff, but, on my 6.4 I would personally get the extra gallon, I still have a 1/2 gallon of rotella T6 sitting in my garage from my last oil change since I switched to Amsoil.
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Old 02-08-2012, 11:10 AM
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It probably wouldn't do anything but I would just buy the extra gallon.
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Old 02-08-2012, 01:09 PM
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Thanks for the info guys. I will buy the extra gallon. I dont mind buying the extra gallon it just sucks to have oil lying around that i am not using.
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Old 02-08-2012, 01:19 PM
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Quote:
Originally Posted by 04hdfatboy View Post
Thanks for the info guys. I will buy the extra gallon. I dont mind buying the extra gallon it just sucks to have oil lying around that i am not using.
just do what i do, change the oil on the lawn mower
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Old 02-08-2012, 03:02 PM
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How come you are switching to the shell? I've been using the Valvoline but in 15-40. I was going to go to the 5-40 next change.


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Old 02-08-2012, 03:06 PM
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Originally Posted by kevinah View Post
How come you are switching to the shell? I've been using the Valvoline but in 15-40. I was going to go to the 5-40 next change.


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Well i have tried the valvoline 15W-40 and the extreme 5W-40. I switched to the 5W-40 for the winter. I think i want to stick with synthetic but the Rotella T6 is quite a bit cheaper than the valvoline extreme blue 5W-40
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Old 02-08-2012, 03:22 PM
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ahh, makes sense. I was thinking there was something you didn't like about it.
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Old 02-08-2012, 03:23 PM
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Na just the rotella synthetic is cheaper lol
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Old 02-08-2012, 07:39 PM
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Go right ahead and mix the two new oils. You have a fair bit of the prior oil remaining between changes no matter how long you let it drain.

One of the requirements for SAE/API ratings is that oils be compatible when mixed.
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