Checking Oil
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Mountain Pass
Joined: Aug 2018
Posts: 221
Likes: 8
Checking Oil
The morning after bringing home my F250 6.7 I checked the fluids. The oil on the stick was about 3/4 to the full mark which surprised me. Reading the manual it says to run the truck up to temperature and then shut off and let sit for 15mins.. Yesterday after a trip I remembers and did as the manual states and she's perfect. I've always checked my diesel Suburban cold, first thing in the morning before starting. Can anyone explain why Ford has you check when the truck is hot/warm? Isn't it checking the level of oil in the pan which would be at its highest after sitting over night?
More Turbo
Joined: Oct 2020
Posts: 667
Likes: 156
I've always checked it hot but can certainly see your logic......you turn it off hot, it all runs to the pan and remains there in the morning.
in theory, cold oil doesn't creep as well as hot so checking it hot eliminates scenarios where user error may come into play such as starting cold, moving short distance and checking oil while the cold oil is clinging to engine parts.
Expansion may also play a role.
in theory, cold oil doesn't creep as well as hot so checking it hot eliminates scenarios where user error may come into play such as starting cold, moving short distance and checking oil while the cold oil is clinging to engine parts.
Expansion may also play a role.
Super Moderator
Joined: Aug 2008
Posts: 37,384
Likes: 1,868
From: Frederick, MD
I check mine cold. I know where the level on the dipstick at oil change time so I know if I am accurate.
Checking hot after a heavy prolonged tow, even after sitting a few hours for me, will yield a low oil level. There is so much left on the top end.
Rechecking after about 1/2 day will yield a better level.
Checking hot after a heavy prolonged tow, even after sitting a few hours for me, will yield a low oil level. There is so much left on the top end.
Rechecking after about 1/2 day will yield a better level.
Laughing Gas
Joined: Dec 2019
Posts: 863
Likes: 35
From: MA
The morning after bringing home my F250 6.7 I checked the fluids. The oil on the stick was about 3/4 to the full mark which surprised me. Reading the manual it says to run the truck up to temperature and then shut off and let sit for 15mins.. Yesterday after a trip I remembers and did as the manual states and she's perfect. I've always checked my diesel Suburban cold, first thing in the morning before starting. Can anyone explain why Ford has you check when the truck is hot/warm? Isn't it checking the level of oil in the pan which would be at its highest after sitting over night?
Fleet Mechanic
Joined: Nov 2006
Posts: 1,664
Likes: 219
From: Northwest
Personally, for me............... I always want to see oil level a tad above the full mark. Hot, cold, parked on a slope, winter, summer, day or night............ Just my little bit of reassurance.
Never had an engine blow out seals or any other related issues to oil level......
Congratulations on checking your own oil level. The world would be a better place if each operator would check the oil at the beginning of the day....
Hobo
Never had an engine blow out seals or any other related issues to oil level......
Congratulations on checking your own oil level. The world would be a better place if each operator would check the oil at the beginning of the day....
Hobo
Laughing Gas
Joined: Dec 2019
Posts: 863
Likes: 35
From: MA
Personally, for me............... I always want to see oil level a tad above the full mark. Hot, cold, parked on a slope, winter, summer, day or night............ Just my little bit of reassurance.
Never had an engine blow out seals or any other related issues to oil level......
Congratulations on checking your own oil level. The world would be a better place if each operator would check the oil at the beginning of the day....
Hobo
Never had an engine blow out seals or any other related issues to oil level......
Congratulations on checking your own oil level. The world would be a better place if each operator would check the oil at the beginning of the day....
Hobo
Hotshot
Joined: Jun 2003
Posts: 12,353
Likes: 4,388
From: SW VA
Personally, for me............... I always want to see oil level a tad above the full mark. Hot, cold, parked on a slope, winter, summer, day or night............ Just my little bit of reassurance.
Never had an engine blow out seals or any other related issues to oil level......
Congratulations on checking your own oil level. The world would be a better place if each operator would check the oil at the beginning of the day....
Hobo
Never had an engine blow out seals or any other related issues to oil level......
Congratulations on checking your own oil level. The world would be a better place if each operator would check the oil at the beginning of the day....
Hobo
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Laughing Gas
Joined: Dec 2019
Posts: 863
Likes: 35
From: MA
Wouldn't think you'd blow a seal but rather have more oil being thrown on the cylinder walls and maybe a little smoke. I don't think even a quart over would have the crank throws dipping into the oil to aerate and froth it. I wouldn't think it would do anything at all in an 8 quart pan. I put to much in my rider once awhile back by mistake it smoked then I let some out. Then last year I didn't put the drain plug back in my daughters car and added all 5 quarts of new oil Castrol Edge full synthetic .....30 dollar bill out the window I've done that twice in 50 or so years.
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Hotshot
Joined: Jun 2003
Posts: 12,353
Likes: 4,388
From: SW VA
Wouldn't think you'd blow a seal but rather have more oil being thrown on the cylinder walls and maybe a little smoke. I don't think even a quart over would have the crank throws dipping into the oil to aerate and froth it. I wouldn't think it would do anything at all in an 8 quart pan. I put to much in my rider once awhile back by mistake it smoked then I let some out. Then last year I didn't put the drain plug back in my daughters car and added all 5 quarts of new oil Castrol Edge full synthetic .....30 dollar bill out the window I've done that twice in 50 or so years.
Laughing Gas
Joined: Dec 2019
Posts: 863
Likes: 35
From: MA
Agree............................I meant a lot more over than a quart. I think the worst that would happen is it would smoke.
Laughing Gas
Joined: Dec 2019
Posts: 863
Likes: 35
From: MA
I don't over fill ever, it was what could or would happen when done by a little or a lot.
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