Spec oil capacity for 1978 FJ40 is 8.5 quarts. I consistently only need to 7-7.5 quarts to fill it up. Any theories? Did the oil pans change, with my truck possibly having an older pan that sits lower? Did dipsticks change?
Oil Capacity Significantly Lower than Spec
- Thread starter Von Hayek
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Does that include a qt for the filter?
My thought as well
- Thread starter
- #4
Are you asking if the 8.5 qt. spec is the drain and refill spec? I don’t know. I just see it is the engine oil capacity.
Anyone here know how much oil they need for an oil change?
Anyone here know how much oil they need for an oil change?
Sometimes they give the capacity for a rebuild - as in no oil at all in the engine - when you drain the oil not all of it comes out.
- Thread starter
- #7
No, I have no oil cooler. Was that an option, or was mine potentially removed?Does it have factory oil cooler?? My 78 40 did!! Less oil won't hurt anything, especially a quart or quart and a half. Which might be the cooler's capacity
. Was factory.
Was probably stock in '78 but they are easily deleted.
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Are you replacing the spin on filter? Is it the original full size filter or one of these newer smaller filters? Last question are you filling oil then checking the level filling or filling to level? Run the engine for a few minutes and checking again? The filter holds and take a long time to drain. Filter because of its design holds oil.
When ever I change oil on a F from 74 on I poke a hole in the top of filter and let drain for a few minutes. Put tape over hole before removing. It reduces amount of oil that normally spills out and makes a huge mess.
When ever I change oil on a F from 74 on I poke a hole in the top of filter and let drain for a few minutes. Put tape over hole before removing. It reduces amount of oil that normally spills out and makes a huge mess.
- Thread starter
- #11
I'm replacing it with the newer, smaller YZZD3 filter. But this till happened before I ran out of the old ones. I check the oil both ways: I check it after I fill the engine but before I start it, then I start it and recheck.
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FWIW - Check your dip stick part number.
Check the p/n's shown in the attached pics. Yes, there are different #'s for the pan, and dipstick, year of build depending. Last pic is the dipstick from my 01/72 truck.
- Thread starter
- #14
Good on the dipstick end.
My 2 cents, go synthetic. I swore by 30 wt as I live in Cali and used 30 wt in all the engines, put in LS and found they don't like the 30 wt like the old SBC's do so tried Mobil 1 synthetic after seeing motors run with zero OP and not heat up for a good 10 min. My oil pressure came up a bit to, I have a 2001 LS 6.0 and it is stock, runs 40 psi at idle on synthetis, like 11 on reg 30 wt.
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- #17
Don't won't to start a whole debate about oil, but I've been running Rotella 15W-40 for years. Nothing has broken yet.
You said you have a '78 and the pic you show of your dipstick is incorrect for your year. Check year of build and p/n's in the first pic. I can't say this is your issue.