Here is houston the summers are brutal so I like to use a little thicker oil. Is this ok?

I would recommend you use a straight 30 weight oil. No need for the 10W winter blend.

I use Mobile 1'* 10-30w, no where near as warm as you

O'Neil, I switched to 5W30 a few years ago when I installed the Oil pressure kit.

You should be using 0W30

We get temp'* up to 114* in the summer and i use 5w/30 Mobile 1 year round. We have put 165,000 miles on our car and the 5w/30 works just fine. And my wife drives the car pretty hard. We also drive this car in the mountains(up to 10,000 feet) on some pretty steep grades(up to 29%), the engine just keeps going and going, it wont even burn 1 qt. of oil in 10,000 miles.

ROD

I use a block heater as well

I ordered my Bonne with the optional block heater but have never used it.

Where i live i don't need a block heater.

ROD

You don't need frost plugs either but you have them.