Mixing oils?

[Nick389_1]

I have about half a can of Ford Motorcraft 5W20 WSS-M2C945-A spec oil for my S197 GT 2008.

I couldn't find this type of spec, but doing some research shows it is superseded by WSS-M2C945-B1. (couldn't find this type of spec either).

So I bought Castrol Magnatec 5W-20 , oil spec wss-m2c948-b (designed for Ecoboost and not only).

Is it ok to mix the two oils? (Castrol 5w-20 wss-m2c948-b with Ford Motorcraft 5W20 WSS-M2C945-A)

 

[Dino Dino Bambino]

I don't see any harm in mixing the two. Both are the same grade, and one is synthetic blend while the other is full synthetic.
I use the same Castrol Magnatec 5W-20 that you mentioned and it's absolutely fine. I change it every 5000 miles.

 

[KonaMustangGT]

It's better than letting the engine run dry, but generally running mixed oils isn't a good idea. There's no expectation the additive packages (especially from different manufacturers) will be compatible. I wouldn't do that for the long run, but if you're going to change the oil soon I'd be less concerned.

 

[skwerl]

It's better than letting the engine run dry, but generally running mixed oils isn't a good idea. There's no expectation the additive packages (especially from different manufacturers) will be compatible. I wouldn't do that for the long run, but if you're going to change the oil soon I'd be less concerned.

Absolutely hilarious!

I find it amazing the things some people will pull out of their asses.

 

[Bingo]

That extra PPM of zinc is going to be catastrophic!

 

[Nick389_1]

Well ok thanks for the replies guys, just wanted to use the original oil somehow, which I'll do.

 

[Coosawjack]

Absolutely hilarious!

I find it amazing the things some people will pull out of their asses.

Good one Skwerl!!

 

[MrBhp]

Mixing oils won't hurt a thing. I've ran as many as 3 different oils in one of my motors with no ill effects, and that motor is a high torque configuration that I occasionally run 52 lbs of boost on. And it has 192k miles on it. You're good to go.

 

[RED09GT]

A lot of oils state on the bottle that they can be blended with other oils. I think that is a pretty strong indication that there is no issue, especially blending oils with the same viscosity.

 

[Nick389_1]

Cool. thanks for confirming.