Built a ford 410 windsor stroker for my 1969 mach1 ,billet roller cam,.0027-.0029 clearance mains(3.0" mains),.0021-.0022 rods(2.1 rod journal).Engine builder says to use 10w30 for break in-flush,
2 quick oil and filter(w/magnet)changes about a hour each.Then run what ever 10w30 oil I want.
Was wondering if m1 0w40 would be a good choice in place of a 10w30? Never see winter,temps would be lows 40s in spring-fall and highs 90s mid summer.If m1 0w40 isn't a good choice will probably stick with brad penn grade1 semi-synth 10w30. I keep a stash of m1 0w40 for my polaris atv so it would be convenient.Any suggestions?
2 quick oil and filter(w/magnet)changes about a hour each.Then run what ever 10w30 oil I want.
Was wondering if m1 0w40 would be a good choice in place of a 10w30? Never see winter,temps would be lows 40s in spring-fall and highs 90s mid summer.If m1 0w40 isn't a good choice will probably stick with brad penn grade1 semi-synth 10w30. I keep a stash of m1 0w40 for my polaris atv so it would be convenient.Any suggestions?