how much oil
Five (5) quarts w/ change of oil filter. Chances are: (1) you have a larger than stock OEM oil pan; (2) you have a really big oil filter; or, maybe your dipstick is stuck or bent or not the correct dipstick?
stock one quart filter, pan looks stock but looks pretty deep towards the front. must be dip stick is wrong.
OK, so I noted you edited your first draft to this post from down 3/4 qt to down 1 1/2 qts. Honestly, I think that makes more sense if you look at after market oil pans since I believe I recall many of the aftermarket oil pans have a capacity of ~7 quarts if I'm not mistaken. So, if you dropped in 5 qts, ran the engine, checked the oil level and you're down ~1.5 qts that's closer to a 7 qt oil pan.
Really not sure outside of what the numbers state and what Kenneth already made mention. If you were aren't able to know for a "fact" it is either a stock OEM oil pan or an aftermarket NOS stock replacement, it's rather hit or miss. Hey, I've done worse - working on my tractor, my lawn mower, motorcycle, car & truck on the same day (I don't do this often) changing oils in early spring. Oil cans laying about on the floor, recovery oil from buckets from hell, and thinking I surely put 5 qts in that car! Hmmm, how come I have an extra quart of oil over here? Anything is possible. Hell, drain it again and count your quarts?
Really not sure outside of what the numbers state and what Kenneth already made mention. If you were aren't able to know for a "fact" it is either a stock OEM oil pan or an aftermarket NOS stock replacement, it's rather hit or miss. Hey, I've done worse - working on my tractor, my lawn mower, motorcycle, car & truck on the same day (I don't do this often) changing oils in early spring. Oil cans laying about on the floor, recovery oil from buckets from hell, and thinking I surely put 5 qts in that car! Hmmm, how come I have an extra quart of oil over here? Anything is possible. Hell, drain it again and count your quarts? 

Personally, I'd want to know the capacity of that oil pan. That would be tough w/o dropping the pan and w/ no visible numbers to confirm. I'd definitely check the integrity of the dipstick - you're sure that dipstick is the correct dipstick? It's far better to bring that oil up to capacity and possibly a tad overfilled than under filled, IMO. I would not necessarily say the same for other system's oil capacities. But, personally I wouldn't run 5 quarts of oil in a 7 quart capacity oil pan - if, in fact, that is the oil capacity (which you can't validate). Running 1/3 less oil than capacity means the oil is going to run hotter, as well. If you can validate you have 5 quarts of oil in the crankcase + filter; and, you're still 1.5 quarts low on the dipstick - something is wrong - wrong dipstick or wrong oil pan.
Maybe check the dipstick and tube as well.
Measure the dipstick length from the tip to the full mark and also to the top where it seals against the tube.
Measure the tube from the block to the top of the tube (assuming you can get in there to measure it).
This old post has the info for the stick. Just need to locate the indicator info.
https://classicoldsmobile.com/forums...uestion-34922/
Measure the dipstick length from the tip to the full mark and also to the top where it seals against the tube.
Measure the tube from the block to the top of the tube (assuming you can get in there to measure it).
This old post has the info for the stick. Just need to locate the indicator info.
https://classicoldsmobile.com/forums...uestion-34922/
Last edited by Fun71; Apr 23, 2020 at 01:23 PM.
I found the info below in Chris Witt's part number spreadsheet but there weren't any measurements for these sticks and tubes (indicators and guides in CSM-speak).
393974
INDICATOR, engine oil level [dipstick]
66-67 BB 400 425 exc. Toro, with Cruise Control
386319
INDICATOR, engine oil level [dipstick]
66-67 BB 400 425 exc. Toro, w/o Cruise Control"
389375
GUIDE, engine oil level indicator Guide Tube
66-67 BB all 400 425 [Toro not listed separately]"
393974
INDICATOR, engine oil level [dipstick]
66-67 BB 400 425 exc. Toro, with Cruise Control
386319
INDICATOR, engine oil level [dipstick]
66-67 BB 400 425 exc. Toro, w/o Cruise Control"
389375
GUIDE, engine oil level indicator Guide Tube
66-67 BB all 400 425 [Toro not listed separately]"
the pan looks like the one for sale, the part number on the stick does not match the ones in post #15 and the stick is 20 inches long. i guess that answers my question. wrong dip stick. Thanks guys i can sleep tonight. lol
just got the car not long i put about 75 miles on it with 1.5 quarts extra. dont think i did any damage
just got the car not long i put about 75 miles on it with 1.5 quarts extra. dont think i did any damage
Last edited by 442gs; Apr 23, 2020 at 02:14 PM.
The stick and tube lengths are matched as a set, so if you have one that doesn't match the other, the oil won't show at the correct level on the stick.
You can add the correct amount of oil and make a mark on the stick to show the "new" FULL level and then you don't have to worry about it in the future.
You can add the correct amount of oil and make a mark on the stick to show the "new" FULL level and then you don't have to worry about it in the future.
The stick and tube lengths are matched as a set, so if you have one that doesn't match the other, the oil won't show at the correct level on the stick.
You can add the correct amount of oil and make a mark on the stick to show the "new" FULL level and then you don't have to worry about it in the future.
You can add the correct amount of oil and make a mark on the stick to show the "new" FULL level and then you don't have to worry about it in the future.
As it relates to "this" particular instance of "uncertainty", I'd still suggest running a non-race performance vehicle (as was described in this thread). However, with additional questions/answers it became apparent (it would appear) the dipstick may be of issue here.
Personally, I'd want to know the capacity of that oil pan. That would be tough w/o dropping the pan and w/ no visible numbers to confirm. I'd definitely check the integrity of the dipstick - you're sure that dipstick is the correct dipstick? It's far better to bring that oil up to capacity and possibly a tad overfilled than under filled, IMO. I would not necessarily say the same for other system's oil capacities. But, personally I wouldn't run 5 quarts of oil in a 7 quart capacity oil pan - if, in fact, that is the oil capacity (which you can't validate). Running 1/3 less oil than capacity means the oil is going to run hotter, as well. If you can validate you have 5 quarts of oil in the crankcase + filter; and, you're still 1.5 quarts low on the dipstick - something is wrong - wrong dipstick or wrong oil pan.
You may want to confirm that for yourself. Stock pans hold 4 quarts, stock filter holds 1. With those parts, that is the correct amount of oil. Toro pans hold another quart.
Also may want to check you have the right stick and the right tube, installed correctly.
400 E block dipsticks are rare.
Also may want to check you have the right stick and the right tube, installed correctly.
400 E block dipsticks are rare.
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