SAE 10 lube oil $(\mathrm{SG}=0.93)$ is being pumped upward through a straight $1 / 4 \mathrm{in}$. sch 80 pipe that is oriented at $45^{\circ}$ angle to the horizontal. The two legs of a manometer using water as the manometer fluid are attached to taps in the pipe wall that are $2 \mathrm{ft}$ apart. If the manometer reads 15 in., what is the oil flow rate in $\mathrm{gal} / \mathrm{h}$ ?