M1 vtwin 20w50 + rotella t6 5w40 = ?

[moosestang]

I mixed 3 quarts of rotella 5w40 with almost a full quart of mobil 1 vtwin 20w50. What will this do to the weight?

The bike calls for 10w40 and my thoughts are the 20w50 will help keep it a 40 weight at operating temp. Surely a 5w40 is going to shear quickly, but I haven't looked up any UOA's on this oil.

 

[OldSparks]

I like the idea. I sometimes fret about the VII's from one oil not working properly with the other, and would also appreciate hearing from the knowledgeable membership here...

 

[Steve S]

You will get a mix of 5w-40 and 20w-50. Oils are compatible and can be safely intermixed. Remember there are only a handfull of companies that make oil additives. Usually what happens is the "strong"oil is weakened and the "weak" oil is strenghtened.

 

[Mackelroy]

If you going to do that, stick with similar type oil like all mobil 1 product.

like 1 quart 20w50 to 2 quart 10w40

Rotella 5w40 and Mobil1 is a [censored] mixture IMO

 

[kballowe]

Nothing. You now have a mixture of predominately Rotella and almost a quart of another fine motor oil. Not enough to make a big difference.

Still, like some other wise man said - try to stick with the same oil manufacturer if that is something that you plan to do on a regular basis.

Remember that many motorcycles leave a quart of (whatever WAS in there) behind when you change the oil. You can never get it all out. In my mind, it won't make much - if any - difference.

 

[Qwiky]

I make it a 8.75w42.5