in my work truck, 89 blazer. yesterday morning when i got to the jobsite and stopped i noticed that my check gages light was on and when i looked around i noticed i had no oil pressure. so i shut it off checked the oil and it was bone dry. so i put 2 quarts in and then on the stick it showed full. started it up and still the same thing. but i gave it a lil gas and it went away. and i had like 40 psi at qtr throttle. but when idling the check gages light comes on and the psi goes to 0.
any ideas as to y? and what should i do?
the truck has 187,000 miles on it. and this is the first tme any lights came on in the dash.

 

one more thing, b4 it was always around 45 psi at idle and 60 at cruising speeds.

 

put a good oil pressure test guage on there and see what the real pressure is

other than that, i'd say it doesn't look good...

 

hey thanks scott for that. well i actually went out there, started it up and it was at 70 psi in park for 5 minutes. so i think it just needed oil. tomorrow i will be driving it for a while and it will hopefully be fine. only time will tell

 

oil generally helps

the beater i'm driving aparently sprays oil out on the exhaust while flooring it, checked the dipstick and its below "add"

oops!