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Oil Viscosity??

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Old 08-23-2014, 02:55 PM
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Oil Viscosity??

Hey guys

Gonna change the oil in my f350 dump truck, should i use the 5w40 recommended for heavy duty use? tow a bobcat a few times a month as well as a dump trailer, and obviously use it as a dump truck often, but i still think the truck has an easy life as far as dump trucks go. i don't work it too hard but if i should use the heavy oil then i will.


thanks
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Old 08-23-2014, 03:24 PM
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That is what I run and based upon what you do with it I think so as well.
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Old 08-24-2014, 07:02 AM
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Tom, since 5w40 syn is the same price as 10w30, even if you're not using your truck hard, why not? Rotella T6 is $22 a gallon at Walmart.
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Old 08-24-2014, 07:40 AM
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is it ok that i'm in the northeast where it gets cold? sorry, i really don't know much about this stuff
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Old 08-24-2014, 07:44 AM
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Read the owners manual. It will indicate the viscosity of the oil you should use according to the temps.

I think you will be fine myself.

Also did your truck come with the engine block heater?
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Old 08-24-2014, 07:44 AM
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Absolutely! With the cold weight being 5 instead of 10 it actually flows better at low temps and protects better at high temps being 40 instead of 30...
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Old 08-24-2014, 07:48 AM
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yeah it has the engine block heater, as if it needs it the glow plugs are amazingly fast. the only reason i use it is for instant heat
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Old 08-24-2014, 08:03 AM
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Either oil will do fine for your use. Most dealers don't have the owner fill out a questionnaire before they do an oil change, they just put the factory recommended 10w30 in.

I'd use 10w30 if I were you and switch to 5w40 for the winter.
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Old 08-24-2014, 08:09 AM
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Quote:
Originally Posted by Tom View Post
I'd use 10w30 if I were you and switch to 5w40 for the winter.
Actually, 5/40 would be the better weight year round.
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Old 08-24-2014, 08:25 AM
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Originally Posted by Karl4Cat View Post
Actually, 5/40 would be the better weight year round.
But a little more expensive and for little gain during the summer time. The big issue is cold starting during the winter, and that's where having a thinner synthetic oil would really pay off. Lots of talk about thicker oils for high ambient temperatures, but I agave yet to see a bad UOA with factory specified oil.
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Old 08-24-2014, 08:27 AM
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10/30 is less than 22 a gallon? I guess I never priced it...
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Old 08-24-2014, 08:27 AM
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The beauty of that 5w/40 synthetic. It is especially valuable to all you northerners in my opinion. It's like super slick water at 70° and up. Your cold weather performance is only a big deal when you first start it, right?

I think the T6 would be a great choice and it's cheaper than the Motorcraft.

Unless there's been a change, I remember the Motorcraft being almost $10 more/gal than the shell.
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Old 08-24-2014, 08:30 AM
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Quote:
Originally Posted by ruschejj View Post

I think the T6 would be a great choice and it's cheaper than the Motorcraft.

Unless there's been a change, I remember the Motorcraft being almost $10 more/gal than the shell.
That's what I was thinking but couldn't argue price with mod Tom as I've never considered 10/30 so never priced it...
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Old 08-24-2014, 08:34 AM
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Just wait for it, tom won't let it go for long, lol....
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Old 08-24-2014, 08:49 AM
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Quote:
Originally Posted by Karl4Cat View Post
10/30 is less than 22 a gallon? I guess I never priced it...
Yeah, I haven't looked in a year or so but I believe it can be had for around $15-16/gal for T5 synthetic blend. That's about $15 less for an oil change.

Quote:
Originally Posted by ruschejj View Post
Just wait for it, tom won't let it go for long, lol....
Who...me?
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