Best oil for Queensland (Australian) summer?

[Tengu]

I know this has been discussed up down and side ways all over the forum and I have tried to read as much as I can...

I have just ordered the oil cooler and spin-on oil filter from Randy RPM

now the question is... what oil should I use?
I gather from reading that the standard is 20w-40 but some folks change that up for summer riding to 20w-50 and others use 10w-40 as a standard, or even as low as 5w-30

so I want some ideas please, it needs to be an oil that will cope with the Qld summer heat

I also noticed that my FJ doesnt like to start on a cold winter morning until the sun warms her up a bit (I gather this means the oil is too viscous in the cold!) so I might need a summer oil and a winter oil?

thanks folks

[Harvy]

Mate, I've always run 20w50 here in SE Qld.

Harvy

[ELIMINATOR]

How cold is it in Queensland in winter then? I'm using 20/50 in England in winter.

[Tengu]

Thanks Harvy - any suggestion on which brand and from where? ( I can see this could open the can of worms!)

Eliminator... in ol' Brisbane town in deepest darkest winter it averages around 10 deg in the mornings but can get as cold as between 0 and 5 once or twice, much colder out of the city tho

[Harvy]

Yeah, don't want to start an an oil shit fight either, so I've PMed you.

Harvy