5w40 / 5w50

[alcyon]

Redline has 5W50, 10W50, 15W50 and a 20W50 if you wanna run a 50 weight that would not shear.
On the other hand, if you use a very good 40 weight like 5W40 or 10W40 (again Redline comes to mind) it should not thin out.
It is expensive though.

Shell Helix Ultra 5W40 is cheap where I am.

 

[Vladimir Bonev]

Shell Helix Ultra 5W40 is cheap where I am.

Good to know

 

[Marcozi]

Yeah, a 4 liter bottle goes for about $35.