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Alex V. · 11-23-2015, 12:34 AM

Stock, carb'd flat-tappet 350: Valvoline Max-Life 10-30 or 10-40 w/ZDDPlus.
Stock, carb'd flat-tappet 454: Schaeffer's 10-30 syn. blend, switched from their 15-40 on the last change and see no undesirable affects so far. Zinc additive every few changes.
Turbo 1.4L in my Cruze: Valvoline full syn. until 52,000 then switched to Schaeffer's full syn for better peace of mind in extending my OCI to 7,500 mi.
Wix, Napa, or Delco filters on everything. I've seen two 350's (one flat-tappet Q-jet, one roller Vortec) pass the 350,000 mark with a healthy, tight bottom end and little or no oil consumption on Valvoline products, so I'm pretty confident in them.

11-23-2015, 12:34 AM	#58
Alex V. Registered User Join Date: Mar 2013 Location: Campbellsville, KY Posts: 888	Re: What type of oil do you use? Stock, carb'd flat-tappet 350: Valvoline Max-Life 10-30 or 10-40 w/ZDDPlus. Stock, carb'd flat-tappet 454: Schaeffer's 10-30 syn. blend, switched from their 15-40 on the last change and see no undesirable affects so far. Zinc additive every few changes. Turbo 1.4L in my Cruze: Valvoline full syn. until 52,000 then switched to Schaeffer's full syn for better peace of mind in extending my OCI to 7,500 mi. Wix, Napa, or Delco filters on everything. I've seen two 350's (one flat-tappet Q-jet, one roller Vortec) pass the 350,000 mark with a healthy, tight bottom end and little or no oil consumption on Valvoline products, so I'm pretty confident in them. __________________ Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue.