Yeah a.mix...want too basically use them up..been sitting in my closet since 2013.time tio get rid of them. They were around $3.79 a quart clearance. Between $3.19 and $3.79 quart.Let me get this straight, using a mix of 10w30 [-49 pour point] and 5w30 at temps down to 9F?
No brainer, of course it's good.
In the 60s,70s and 80's 10w30 was the #1 oil, and North America, north of Tennessee, did not come to a stop in the winter