Two questions...
A combination of too much heavy oil will tax your engine to overcome the sheer resistance and as a result, drastically reduce gas mileage and HP.
Modern Ford engines run hotter and they use 5W20 blended oil. So, heavier viscosity doesn't equal better lubrication. Why such drastic departures from the owner's manual? - Dave
- Why 8 quarts in an FE engine? I can see maybe one extra quart if your engine is sustaining high speeds (Interstate highway driving) because a lot of oil will be on top of both heads if your rocker arms are not restricted.
- Why break-in an engine with such high viscosity oil? Are you looking for higher concentrations of ZDDP for flat tappets?
A combination of too much heavy oil will tax your engine to overcome the sheer resistance and as a result, drastically reduce gas mileage and HP.
Modern Ford engines run hotter and they use 5W20 blended oil. So, heavier viscosity doesn't equal better lubrication. Why such drastic departures from the owner's manual? - Dave
Comment