Okay, now Mabeauchamp is completely confused. Sorry for my part. I hope you guys are not trying to solve my problem. cause I got no problem . Since I changed to low pressure spring several years ago , I havent had any leaky intake seals. As far as oiling the engine, After 400 runs the bearing patterns were as good as I have ever seen. I will continue to use the high volume pump with std. spring because it works for me. Is it best? Dont know-dont care. What is safest for street engine? If it were mine, I would use std pump . Good luck Mabeauchamp.