Useful adaption to spray gun.
Thats a great idea noblng for an awkward spot to pour oil. Trying to pour oil uphill is a pain, especially around the diff/gearbox.
Here is one idea i found on this web site and put to use for spraying uphill . I cant remember who posted but it works great. It allowed me to spray under the dash and under the guards inside the trunk in my mustang where there was originally no paint. Just add a small piece of fuel hose and push two air hose fittings into each end.Trick was to spray with your head up under neath and not fume yourself out.