What I was thinking of doing is only using it in the summer and spiking it with 1 qt. of Marvel Mystery oil which is what I do anyway with the other multi-viscosity oils.

I found some HD SAE40 oil for sale in a sealed 55 gal. drum for $1 per gal. Which I thought was a good deal. I was pretty sure it also had the extra zinc in it also.

Thanks for the feedback.