Anyone use Rotella T6 Full Synthetic in their LS

[oscar169]

I was going to use the T6 in my tractor but I'm going with the Schaeffer's 9000 Fully Synthetic 5W-40 instead and also going with the Schaeffer's #315 Simplex Supreme for the trans

 

[Hinomotoman]

If it is thick when hot, how come hot oil drains better then cold?

Eugene

 

[TomSeller]

If it is thick when hot, how come hot oil drains better then cold?

Eugene

Who said you could bring reality into the discussion?

 

[LD1]

Oil don't thinken when hot. Or it don't thin when cooled.

Cold 5w oil is thicker than hot 40w oil.
Cold 40w is thicker than cold 5w.

So, straight 40w oil goes from what it needs to be when hot, to extremely thick when cold.

The 5w just means it doesn't thicken up as much. In an ideal world, the viscosity would be the same at any given temperature.

As to why auto makers don't recommend the lower cold viscosity stuff, they recommend minimums. You can always use better. Why don't they recommend synthetic? Or premium this or premium that?

 

[oscar169]

Oil don't thinken when hot. Or it don't thin when cooled.

Cold 5w oil is thicker than hot 40w oil.
Cold 40w is thicker than cold 5w.

So, straight 40w oil goes from what it needs to be when hot, to extremely thick when cold.

The 5w just means it doesn't thicken up as much. In an ideal world, the viscosity would be the same at any given temperature.

As to why auto makers don't recommend the lower cold viscosity stuff, they recommend minimums. You can always use better. Why don't they recommend synthetic? Or premium this or premium that?

Because how many more New cars would the Auto makers not sell every year if people used good oils and did pm on their vehicles, most the auto makers house brand of oil is nothing special.

 

[oldpilgrim]

Why don't they recommend synthetic? Or premium this or premium that

Both my new Toyotas, a truck and a car, say to use synth oil 0w40.

How something can be a 0 weight is beyond me.

Sorta like women's clothing size zero. I always wondered what size they'd wear if a 0 was too big.

 

[charles todd]

Both my new Toyotas, a truck and a car, say to use synth oil 0w40.

How something can be a 0 weight is beyond me.

Sorta like women's clothing size zero. I always wondered what size they'd wear if a 0 was too big.

0W-40 is the "European Formula." I used it in a MINI Cooper S, BMW engine.

CT

 

[houstonscott]

My son owns an LS U5030, he runs T6 in it, with LS factory filters, no issues. I use T6 in my Kubota's, L3800, RTV1100, and GR 2120 mower. HS

 

[SPYDERLK]

You are correct it is a 40W oil... When warmed to operating temp. It is a 5W at "room temp" or not engine temp. If it was 40W when at environmental temperature, an it was 20* outside, I'd be surprised if the starter would even turn.

Multi-viscosity oils always read like this. First number is its pour weight (5W) second number is its operating weight (40W). 5W-40 is usually for cooler climates and 15W-40 for warmer.

Bob is the Oil Guy is a great forum for discussing oils. - Bob is the Oil Guy - Bob is the Oil Guy There is so much lubrication knowledge to be gained here, your head is likely to explode before absorbing it all. I skim the message forums occasionally.

CT

Oil don't thinken when hot. Or it don't thin when cooled.

Cold 5w oil is thicker than hot 40w oil.
Cold 40w is thicker than cold 5w.

So, straight 40w oil goes from what it needs to be when hot, to extremely thick when cold.

The 5w just means it doesn't thicken up as much. In an ideal world, the viscosity would be the same at any given temperature.

As to why auto makers don't recommend the lower cold viscosity stuff, they recommend minimums. You can always use better. Why don't they recommend synthetic? Or premium this or premium that?

Finally
,,,Finally!
,,,,,,The multi grades are thin to start and get thinner more slowly. Synthetic oil bases require much less additive to cover a broad range. You wont see a dino oil cover 0W-40 ... probably not even 5W-40. Such a dino would be practically ALL ADDITIVE. Additives are not very good lubricants.
larry

 

[DK35vince]

Y'all saying the same thing. Thin when cold, thick when hot. It is not a 5W or a 40W. It is a 5W-40 oil/additive mix.

No we are not.
I never said 5w-40 started out thin then got thicker.
Rotella 5w-40 is a 40 weight oil, it does not start out thin when cold then get thicker. It is a 40w oil.
Oil thickens in extreme cold.
The 5w-40 has additives in it to help keep it from thickening as much when very cold.
If you take a 5w oil and put it in the freezer it will thicken.
If you put a 5w-40 in the freezer right beside the 5w the 5w-40 has additives so it should still pore the same as the 5w in extreme cold.