Oil pressure
Oil pressure
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New User
Joined: Sep 2002
Posts: 22
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Oil pressure
i was running starit 40w motor oil in my 70' f250 390
and i was told that was too thick and i also herd it wasn't
i live in minnesota so the climate is a little cooler here
but anyway i just put in 10w 30 and now my oil presure is good
at 2000 to 3000 rpms but when it idols it drops to L is this normal
or is 40w better or is it my oil pump? i would like the opions
of FORD GUYS other than the opion of the macanic who drives a chevy
and i was told that was too thick and i also herd it wasn't
i live in minnesota so the climate is a little cooler here
but anyway i just put in 10w 30 and now my oil presure is good
at 2000 to 3000 rpms but when it idols it drops to L is this normal
or is 40w better or is it my oil pump? i would like the opions
of FORD GUYS other than the opion of the macanic who drives a chevy
New User
Joined: Jan 2008
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Likes: 24
Oil pressure
30W is okay in the summer
20W in the winter.
10-30W should be fine though
Do a oil pressure test done with a real gauge though,for peace of mind!
[font color=red]Dennis
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20W in the winter.
10-30W should be fine though
Do a oil pressure test done with a real gauge though,for peace of mind!
[font color=red]Dennis
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Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Oil pressure
I agree with the above posts 10-30 oil & 10 lbs per 1000 pressure. 
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John
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In the cool still quiet of night, you can hear chevies rusting away.
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In the cool still quiet of night, you can hear chevies rusting away.
Senior User
Joined: Aug 2002
Posts: 201
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From: Texas
Oil pressure
Try pouring out a quart of straight 40w when it is 20 degrees and you will see why it cannot get into the bearings to do its job.Here in Texas I only use 10w40 in the 100 degree summer months.
Elder User
Joined: May 2002
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Oil pressure
[updated:LAST EDITED ON 10-Oct-02 AT 10:58 PM (EST)]If you want reliable cranking and starting for those Minnesota winters, then 5W-30 is your best bet. Better yet, Mobil 1 5W-30. On those -20F mornings, it will make the difference. 20W-50 won't even crank. But on those hot summer drives, the 20W-50 leaks less. That has been my experience.
--Matt
1972 F250 Custom Sport Camper Special 4x2 360 2v C6 3.73
Soon to have a 104" wheelbase as part of a Broncification project
My FTE Website -- http://www.clubfte.com/users/mlf72f250/index.html
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--Matt
1972 F250 Custom Sport Camper Special 4x2 360 2v C6 3.73
Soon to have a 104" wheelbase as part of a Broncification project
My FTE Website -- http://www.clubfte.com/users/mlf72f250/index.html
My Galleries -- https://www.ford-trucks.com/user_gallery/displaygallery.php?userid=1108
Senior User
Joined: Mar 2002
Posts: 144
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From: New York
Oil pressure
You need the thinner oil where you are for sure! I used 15w40 in Yuma Az but it got to 125 degrees there there on a good day. From what I know 5w30 means the oil acts like 5 weight in the winter and 30 in the summer? If you put that thick oil in your engine it be like cake batter in the winter and you motor would have a dry start wiping out all high friction areas.
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New User
Joined: Sep 2002
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Oil pressure
alright now that i know my oil selection is good then
why is my pressure so low after switching them?
now i can hear the valves start ticking after idol
for 5 or 10 minutes, i do know that ticking in not a good
sign?
why is my pressure so low after switching them?
now i can hear the valves start ticking after idol
for 5 or 10 minutes, i do know that ticking in not a good
sign?
Elder User
Joined: May 2002
Posts: 799
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Oil pressure
It might be a sign of a worn oil pump or worn rod and main bearings.
We had a beige '66 with the inline 240 6 cyl that had low oil pressure and made those lifter noises at low rpms. Eventually it made rod noises. We probably should have replaced the pump and bearings before it got that bad. We gave it to a friend who made it into a trailer. It's still probably hauling junk around Austin.
--Matt
1972 F250 Custom Sport Camper Special 4x2 360 2v C6 3.73
Soon to have a 104" wheelbase as part of a Broncification project
My FTE Website -- http://www.clubfte.com/users/mlf72f250/index.html
My Galleries -- https://www.ford-trucks.com/user_gallery/displaygallery.php?userid=1108
We had a beige '66 with the inline 240 6 cyl that had low oil pressure and made those lifter noises at low rpms. Eventually it made rod noises. We probably should have replaced the pump and bearings before it got that bad. We gave it to a friend who made it into a trailer. It's still probably hauling junk around Austin.
--Matt
1972 F250 Custom Sport Camper Special 4x2 360 2v C6 3.73
Soon to have a 104" wheelbase as part of a Broncification project
My FTE Website -- http://www.clubfte.com/users/mlf72f250/index.html
My Galleries -- https://www.ford-trucks.com/user_gallery/displaygallery.php?userid=1108
Senior User
Joined: Feb 2002
Posts: 465
Likes: 0
Oil pressure
Ticking could be lifters getting sticky
also, try a cold compresion test,then
try the comp while its hot. compare the
readings and the ones with funny readings while cold
probaly have some sticking action in the
valves or lifters.
Fe power
also, try a cold compresion test,then
try the comp while its hot. compare the
readings and the ones with funny readings while cold
probaly have some sticking action in the
valves or lifters.
Fe power
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