optimal engine oil viscosity for the summer?

[psychedelicbeats]

what are your preferences for optimal engine oil viscosity for the summer?
please include engine, milage, auto-x/drifiting/agressive/daily driving, etc..

[DuffMan]

Most people are going to say go with a 20w50 or similar for summer only driving if doing any kind of hard driving.

[thx247]

wally mart, M1 20w50....22 bucks for 5 quarts

[thelinja]

Castrol GTX 20W50, 112500 miles, autox, and on the streets I drive the car like I stole it.

[psychedelicbeats]

yeah walmart service owns for the service charge LOL

[aznpoopy]

for just regular driving i use 10w-30... nj is about 70-90 degrees during the summer.