Valvoline 75w 140 and 75w 90

[Jay3702]

I Thought I bought all the same but I bought one of the 140. Can I mix these? It would give me slightly higher than 90 which now that I think of it wouldn’t be the worst thing

It’s for a 2016 f150 what is electric locking diff

 

[wpod]

Yes .I run 75w-140 in my 2015 ford F150 and in my 2018 F350. They can be mixed.

 

[BISCUT]

Yes .I run 75w-140 in my 2015 ford F150 and in my 2018 F350. They can be mixed.

Concerning your 2015 F150, mind if I ask if you tow? And if you notice any gas mileage hit with 140 over the 90 (IIRC) the 15 calls for? I'm due to do my diffs in about a year. I like the added protection but I don't tow and might be overkill for my application. Thanks!

 

[Jaymie]

I run 75w140 out back and w90 up front in my ram 2500. you Can mix them and you will not notice a difference, its just good your actually changing it, keep those gears and bearings clean and well oiled.

 

[tcp71]

I run 75w140 in my 2016 F150 e-locker. Didn’t notice a difference from the oem 75w90. Changed at 12k miles. Tow 7500lbs in the summer.