[6pack] Synthetic Oil Mix

[forzion at maine.rr.com]

I run synthetic Mobil 1 10W-30 in my car. When on a trip recently, I noted that the crankcase was a quart low. As it was late, all I had access to, on the road, was a high-quality but "non-synthetic" [real] oil. Rather than running a quart low, I added it to the crankcase to complete the ride home. Now, I've got second thoughts: Does mixing a quart of 'real' oil with synthetic withsynthetic pose a problem? Should I go through a whole new oil/filter change?

Dave Friedlander
Maine