leoizq

i have a 1993 coupe with heads cam gt 40 intake and a few more things what oild do u all think i sould use. i tried 10w 30 and my oil pressure was very low at 40 and i tried 20w 50 and my oil pressure is at 60-65 what do u all think. whats a normal oil pressure thanks.

ponyponer

normal is 45-50. use some mobil 1 synthetic i recommend.

92cobra

DO NOT use synthetic oil if you have a high milage motor that leaks, switching from standard oil to synthetic will just make it leak more.

ponyponer

well yeah thats assuming it is devoid of leaks.

tom29

i got 45-55 pounds of oil pressure and i run 10-30 on basiclay stock motor.

If 10w-30 is too low and 20w-50 is too high why dont you just run a conventional 15w-40??

silver91gt

40 isnt low, my old 302 went as high as 20 at idle and 40 at 6k rpm.

i would think what you have is good oil pressure.
my new 347 uses 25w50 oil and its 50-60 at idle and 80 for anything over 3k rpm.

Mustangkiler

Use Castrol anything else will make your engine blow up!

leoizq

thanks u all i think i am going to stay with 20w 50

93 LX FiveO

10w40 with 1 quart of lucas oil additive (stuff is thicker than glue)

when i did this method my oil pressure doubled from 20 at idle to almost 50.

Joel5.0

40-60 psi @2000 rpms and operating temp (175°F+) is the spec for the 5.0's. At idle it could go as low as 15 psi w/out causing any type of damage..... it's normal. By using a higher grade of oil you're wasting some horses to drive the oil pump. My junk has always used (except one time I tried the 20w50 and replaced it in less than 2-weeks) 5w30 or 10w30 regular oil..... it has never failed me in the past 15 yrs.

Pressure is an indication of what really is important.... oil flow, but having too much pressure is as wrong as having too low of a pressure. Just a thought.

BTW...... the required/recommended oil weight for 93-95 5.0's by Ford, is 5w20......per TSB 02-1-9.