I'm new with the sleds, but isn't oil consumption directly related to gas consumption? The ratio should be 40:1 or something like that. (Like you do with the WeedEater gas: so many ounces per gallon.) I assume the injection ratio is constant through the RPM range. You could do the math if you knew how many gallons of gas it took to burn through the oil just to see if the ratio matched what the specs said for ratio?