mobil 1 in the transmission

[wildchild]

G'day Glider,
I have read many posts on oils, I have an 08 Fatboy and live in Australia (Down under), temperature im my area is 0 in winter and up to 45 degrees C (110 Farenheit) in the summer.
I am concidering going away from Genuine HD oil, don't thing they are as good as what they say.
What I am thinking of using is;
Engine , MobilOne V-Twin 20W50
Primary, Mobil 1 Racing 4T 10W-40 or V-Twin 20W50
Transmission, Mobil 1 Synthetic Gear Lube LS 75W-140 or Mobil 1 Synthetic Gear Lube LS 75W-90

I would like to keep to the one brand.
What do you think about the primary and Transmission oils I am considering.

WC

 

[glider]

G'day Glider,
I have read many posts on oils, I have an 08 Fatboy and live in Australia (Down under), temperature im my area is 0 in winter and up to 45 degrees C (110 Farenheit) in the summer.
I am concidering going away from Genuine HD oil, don't thing they are as good as what they say.
What I am thinking of using is;
Engine , MobilOne V-Twin 20W50
Primary, Mobil 1 Racing 4T 10W-40 or V-Twin 20W50
Transmission, Mobil 1 Synthetic Gear Lube LS 75W-140 or Mobil 1 Synthetic Gear Lube LS 75W-90

I would like to keep to the one brand.
What do you think about the primary and Transmission oils I am considering.

WC

Good choices but just make sure of no "energy conserving" labels on the primary oils you choose and synthetics aren't needed in the primary. I suggest the HD Formula + in there. It's less costly and does the job fine in the primary.

 

[Spade5]

What about the difference between the 90 wt and 140 wt for the transmission? Is there any advantage to using one over the other?

 

[glider]

In a hotter climate use the heavier oil (140)