Winter oil for 2017 GT350

[UnhandledException]

Hello forum,

Are there any other oils that I can use in very cold winter months other than the very thick 15-50w? Here are some details about my situation:

- My car is at 65,000 miles out of warranty
- It is kept in Northeast, outdoors 24/7.
- I do have to start it in the mornings, sometimes when its 20F out and every time I worry about oil being very thick and taking too much time to get up to temp

Other cars I own like C7 ZR1 or GT3RS all use 0w40 oil and are significantly easier to get warm. I never understood why this 15-50 is what Ford chose.

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[foolwithtools]

I believe C7 Corvettes also recommend 5W-50 for track use. 5W-50 was chosen because that works better at the high temperatures seen at the track and the GT350 is supposed to be a track car. The owner's supplement suggests switching to 0W-40 of the specification WSS-M2C937-A if the temperature drops below 20F.

Also, 0W-50 does exist, so you can try that!

 

[JAJ]

The Ford oil is actually 5w-50, which is fine at lower temps. Up until 2020 model year, Ford didn't suggest any alternatives, but the Owner's Supplement for 2020 has this diagram on page 53:

 

[UnhandledException]

The Ford oil is actually 5w-50, which is fine at lower temps. Up until 2020 model year, Ford didn't suggest any alternatives, but the Owner's Supplement for 2020 has this diagram on page 53:

Would there be any adverse side effects if I applied this to a 2017 car? I know 2020 has a different block which is common with GT500?

 

[JAJ]

Would there be any adverse side effects if I applied this to a 2017 car? I know 2020 has a different block which is common with GT500?

I can't imagine why it wouldn't work. If you look past the viscosity label numbers and just consider how oil works, 5w50 and 0w40 have viscosity curves that are pretty much the same shape relative to temperature. 0w40's curve passes through the same points as 5w50, it just does it about 5 degrees C cooler.

 

[Bitten in '69]

To the OP. You are starting with incorrect information. You mention 'thick 15w50' oil. All 350s call for 5w50, which is thin and pours easily. There is no reason to change to any other viscosity for cold temperatures.

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