Oil & air

[Ryan Wright]

Couple of questions,

1. How do I change my oil & filter(s) (8V92)? What type of filter(s)
do I buy & where? How many gallons of oil will it take to do this job?

2. How do I manually air the coach up with an external compressor? All
coach air drops to zero within a few minutes of turning off the engine
and I want to air it up in my shop and find the leaks. I do not have
an on-board 12 volt compressor (I want to add one, though). I tried
putting air into the "air" connection (small compartment above the
cruise air's on in the center-driver's side) but there must be a
solenoid or one way valve somewhere because it didn't take much and
didn't air anything up. Also, what's the recommend pressure I should
provide? I generally work with 90psi but can provide up to 150psi @
15cfm.

Thank you!

-Ryan
'86 PT-40 8V92
Tri-Cities, WA