The majority of 4 cylinders use a good 10W 40 Motor oil. No It Will Do Just Fine With 10W40
The 40. 1997 Jeep Wrangler needs 6 quarts of oil for an oil change.
Have you changed your oil lately? You can try adding 10/40 wt. oil the next time you change oil.
The 40 amp motor probably produces double the horsepower of the 22 amp motor.
you might try spraying WD-40 into the bearings of the fan and fan motor, and then spinning the motor by hand a few times. If this does work, you will have to add a regular lubricating oil to the places where you have sprayed the WD-40, as it will dry out fairly quickly. I would recommend using Gunk 'Super Oil'.
40 pounds
It's a 327 with cylinders bored .040" over stock.
Yes this is what we call efficiency of the motor. We give 100 but the motor in turn gives 40, so its efficiency is 40%
40 Psi
WD-40
35 to 40 psi
10w/40