Engine Oil Specs on GT and V6 Motors

[ExCon]

Anyone know why they specify different weights in each motor?

 

[ExCon]

Anyone who lives in Las Vegas or Arizona or Florida: Is it common to increase the weight of the engine oil in order to compensate for the extreme heat? Is this a common practise or am I off base on this?

 

[Mustang5L5]

Anyone know why they specify different weights in each motor?

Because they are different engines made by two different companies with different tolerances and clearances inside each engine.

If two engines require the same grade oil in any make of automobile, it's more of a coincidence really.

 

[martimus]

Anyone who lives in Las Vegas or Arizona or Florida: Is it common to increase the weight of the engine oil in order to compensate for the extreme heat? Is this a common practise or am I off base on this?

My guess: off base! After living in this frying pan for nearly 27 years (40 if you include the 13 years I lived in the former desert known as Los Angeles), I've never run across anyone (car mechanic, car nut, or just plain nut) who increased the weight of their oil to compensate for the 115 degree summers.

What we tend to do however is try to drive faster than the speed of light! This way we tend to avoid many of the negative effects of that big orange ball in the sky! j/k

 

[Firedude]

I live in Yuma AZ. Many years ago alot of people hear would go to heavier oil in the summer to increase oil pressure. Now days with the close tolerences of modern motors, it is not advised. I would not stray to far from what is recommended by the factory. I have always been a big fan of synthetics. Have used them in everything with a motor.

 

[The Extreme]

I myself (live in Phoenix area) have never varied the weight of the oil in my car - 5W30 is what is reccomended for my '97 V6. A mechanic I know has a heavily modded '90 GT that he races and because of the punishment of the races and the heat for a lot of the year, he runs straight 40 weight in it. Even he will admit that's not the best choice for a daily driver, even when the temperature is 115 or higher.

 

[Shakerhood]

I suprized the dont want you to use Ford Motorcraft 5W-20 in both engines!

 

[kevins05v-6]

Anyone who lives in Las Vegas or Arizona or Florida: Is it common to increase the weight of the engine oil in order to compensate for the extreme heat? Is this a common practise or am I off base on this?

I dont think your off base....I think your in left field.
Anyways I have never heard off this living in Florida for 17 years.
ohh and down here its not so much the heat but the humidity LOL..