How much slob do you guy's recomend in; a 4.5qt. sump and a 5qt. sump i've been putting a hole bottle in,i think it's ok for the 5qt sump but is it to much for the 4.5?? should i go down to 1/2 a bottle in the 4.5?? just don't want to over do it with the Zinc i use 5 and 10w-30 Mobil-1 syn.