That's the black stuff !Did you putt it in without the customers permission too?
NO 2QUIK6 They just pored it in,then informed me when I went to pick it up.Like you I let no one touch my stuff,at 1/2 100 I just had a weak moment.
My wife and I had good service with her GMC at the Cadillac dealer they put the Valvoline durablind in that I put in the back,for its first two are three free service.And the few little warranty jobs (loaned her a cad to go to the Mall)That 96 GMC know has 245000 miles,I pulled the intake at about 190 for the dreaded intake water leak.Know its on Valvoline Max Life.No leaks no oil burning No black stuff here you can still see through the oil when I drain it.See my questing about ZDDP.My GN is on Mobile 1 the original owner had it on that all 70000 miles. I see the Valvoline V1 has 1200 ppm of ZDDP I'm owner #2 The Mobile 1 is good stuff add ZDDP are switch ? Thank for all the help