Mixing Mobil 1 Extended Performance 0W20 and 5W30

[Chief2025]

Yeah I could do that too, lol. This August we’ll be heading to Utah from Texas. I was planning to go a thicker oil for the trip.

Good call

 

[ARB1977]

This smells like WAY overthinking things. I wouldn't do the mixing thing. Theres little benefit & potential problems with doing this.

It’s not complicated at all. I’m not looking for benefits. I was wondering if I could do this with two of the same oils. This wouldn’t be permanent.

 

[Ride_Red]

It’s not complicated at all. I’m not looking for benefits. I was wondering if I could do this with two of the same oils. This wouldn’t be permanent.

I agree. It's not complicated.

Mix away and use it up.

 

[Wheel366]

It’s not complicated at all. I’m not looking for benefits. I was wondering if I could do this with two of the same oils. This wouldn’t be permanent.

I am by no means an expert, but you are mixing two different viscosities but within the same family. I don't see why it would be an issue. Maybe different base oils but I would think the additive package is the same or really close.

I mix 5qts of Mobil 1 Extended Performance 0W-20 with about a third of a quart of HPL Premium 0W-20. I do this to get to the full line and I don't have quarts or Mobil 1 lying around. I just happened to have 3qtsof the HPL.

 

[Dave P.]

Pennzoil states on their PDS that their oils can be mixed with other synthetic or mineral oils.

 

[gfh77665]

It’s not complicated at all. I’m not looking for benefits. I was wondering if I could do this with two of the same oils. This wouldn’t be permanent.

I have never been warned against it by any oil producer. It would be a stretch to think different viscosities especially of the same brand would have "clashing chemistries". Just one viscosity would have a different level of VI's than the other. Nothing to worry about.

 

[CleanSump]

Have a look at the thread listing the annual oil changes reported by members. Frankenbrew is as common as flies on cow pies.
Only once in a while do you get someone claiming mixed oil damaged their engine, and they're usually incorrect and just searching for something to blame for an unrelated mechanical failure.