That calculator is pretty slick! 
Last time around I bought some of the new oil (can't recall the brand at the moment) that one amount is supposed to be good for all mix ratios. Handy since all my stuff seems to require a different ratio. But I have to wonder if overtime it will add more wear to the engines compared to using a specific amount for each.
Last time around I bought some of the new oil (can't recall the brand at the moment) that one amount is supposed to be good for all mix ratios. Handy since all my stuff seems to require a different ratio. But I have to wonder if overtime it will add more wear to the engines compared to using a specific amount for each.