I usually install bolts finger tight or snug then take a pre measurement. Since the torque range is 55-65 and the difference in the torque wrenches. I would just sneak up on the stretch. Torque both bolts to 40-45 and check the stretch value. If low add 5 or 2 then recheck. Depending on the torque wrench you have you might be low or high on your wrench number to get the stretch. If all went well you should be around 60ish to get your stretch. Most use straight 30 weight oil not 5w30 etc. With a little practice be no problem