Well maybe your hose is bigger than mine. I think 1/2" will be ok. Also, I think I will add an extra 1/2 quart to the pan to make sure the pickup stays submerged. That along with the hose, two quart filter and extra 1/2 quart should give me close to 7 quarts of oil in the system. I only buzz the engine to 6500 rpm tops so, no worries!