Variable or straight weight oil?

[Trouble Maker]

I'm currently running 20-50 Castrol GTX... If I'm only boating in hot weather (Nevada/Arizona) is a straight weight oil better...say 30 or 40???

[Infomaniac]

I run the same stuff in everything I have.

[MudPumper]

Originally posted by Infomaniac
I run the same stuff in everything I have.
Which is what???

[Daytona100]

Teague says run straight 40. No multigrades.

[cstraub]

Straight WT
Chris

[Strip Poker 388]

I run straight 40 Valvalen racing oil.and 20 50 racing in the race cars, Never had a bearing prob.

[Trouble Maker]

Straight weight it is...thanks!!

[GofastRacer]

This seems to be a matter of preference here. I been using Castrol GTX for over 20 years in all my vehicles with no problems. In my race motors, I've used 20/50 and straight 40wt and not seen any difference in wear whatsoever!...

[nmboats]

What about using synthetic / Amsoil? Goon or Not Good?