owner's manual says 5w-30 or 10w-30?

[clarkjr]

Just curious what the book says for the 94/95.

 

[94-302-vert]

10-4... oops I meant 10w30. Or at least I read that somewhere because that is what I use in my car. I think I read it in my Haynes manual.

 

[Green 94 5.0]

i have always used motorcraft 10w30. never had any issues.

 

[bjl95mustang]

run atleast 10-30 with a high mile 5.0.

 

[HISSIN50]

i am with Brandon.

But you asked what the book says, and it probably says 5W-30 for colder climates (temps under freezing) and 10W-30 at all other times.

 

[urban96]

mobile 10w-30

 

[VetteEater]

Just for clarificatation when you say "use atleast 10w-30" do you mean no higher than 10W-30 or lower? I only run Mobil 1 Synthetic 10W-30 in my car.

 

[HISSIN50]

Just for clarificatation when you say "use atleast 10w-30" do you mean no higher than 10W-30 or lower?

He means an oil of atleast that viscosity or numerically larger (i.e. 10W-40, 15W-50, etc). The tolerances in a motor with some miles on it are not as tight as they once were, ergo the motor can handle a more viscous (thicker) oil.

 

[mo_dingo]

Temperature is the only thing you should consider when considering your oil weight. In AZ at my work, we have only 20w-50 because of the heat.

But if you are in a much colder climate, you should run 10w30 or even 5w30 for really cold climates.
Scott

 

[igotyofire]

Temperature is the only thing you should consider when considering your oil weight. In AZ at my work, we have only 20w-50 because of the heat.

But if you are in a much colder climate, you should run 10w30 or even 5w30 for really cold climates.
Scott

i say temperature and mileage......why single out the other, many people take mileage into consideration and it makes perfect sense as a motor ages ...things wear and tear. but most importantly temperature is important depending on what enviroment your engine startups are in,hehe

 

[Blackened302]

Temperature is the only thing you should consider when considering your oil weight. In AZ at my work, we have only 20w-50 because of the heat.

But if you are in a much colder climate, you should run 10w30 or even 5w30 for really cold climates.
Scott

:Word:

 

[Blackened302]

i say temperature and mileage......why single out the other, many people take mileage into consideration and it makes perfect sense as a motor ages ...things wear and tear. but most importantly temperature is important depending on what enviroment your engine startups are in,hehe

:Word:

 

[mo_dingo]

i say temperature and mileage......why single out the other, many people take mileage into consideration and it makes perfect sense as a motor ages ...things wear and tear. but most importantly temperature is important depending on what enviroment your engine startups are in,hehe

What does the mileage of a motor have to do with the weight of your oil? It's temperature dependant, mileage is irrelevant.

If your motor is old and tired, leaks at the valve or whatever, you could use gear oil and it will still leak.
Scott

 

[95cobradude]

gear oil, lol. i use royal purple 10w30, nothing better.

 

[HISSIN50]

When motors have some miles on them, the tolerances open up a bit. Having thicker oil helps maintain pressure.

The only thing that matters is that one should run the lowest weight oil that maintains decent pressure in all situations. If you guys want a kick, read about what weights of oil are common in Australia. Then note that some of the motors which use this weight are the SAME motors we have here.

Recommendations are based upon more than just what is best for the motor (CAFE standards, etc).