Engine 1979, 258ci Oil capacity

[kushneap]

Hey guys new here and new to CJ's. Have a '79 with the 258ci, been seeing conflicting answers on oil capacity. Some say 5qt. some say 6qt.

Does anyone have a definitive answer on this?

Are you all mostly running conventional 10w30?

Thanks!

 

[CJ]

As many answers on this as there are AMC 258 i6 / 4.2l 's... There were a few different oil pans on 79 ~ 80's AMC 258 i6 / 4.2l 's. I found that my CJ8 is 5.5 qts at change w/ filter. Best place to start is 4 qts + 1 for filter then run until warm. Check dipstick. I'm betting you have the average pan and you will need another 1/2 qt. If you over fill by 1/2 (6 qts) it won't hurt anything.
I run 10w50 synthetic in mine, but I never see cold weather. 10w30 is factory recommended.

 

[kushneap]

As many answers on this as there are 258's... There were a few different oil pans on 79 ~ 80's 258's. I found that my CJ8 is 5.5 qts at change w/ filter. Best place to start is 4 qts + 1 for filter then run until warm. Check dipstick. I'm betting you have the average pan and you will need another 1/2 qt. If you over fill by 1/2 (6 qts) it won't hurt anything.
I run 10w50 synthetic in mine, but I never see cold weather. 10w30 is factory recommended.

To my next question. Where is the oil dipstick?

Thank you for your answer by the way I appreciate it.

 

[CJ]

No problem... Not my engine but I marked it in red.

 

[kushneap]

No problem... Not my engine but I marked it in red.
View attachment 100730

Yeah mine does not have one there or I just didn't see it. Thank you for the pic its helpful

 

[CJ]

It's not uncommon where it has for some reason been removed or was broken and never replaced. If the tube is broken and still in the block they can be a pain to remove. The proper way to remove the tube is to pull the pan, but I have in a pinch driven the tube down until it fell into the pan then put in a new tube or a universal. Don't trust the dipstick length (tube length is irrelevant), always calibrate dipstick length @ an oil change.

Lokar : Engine Dipsticks

Lokar is committed to providing quality custom automotive products. Quality... Plain and Simple!

www.lokar.com

 

[kushneap]

It's not uncommon where it has for some reason been removed or was broken and never replaced. If the tube is broken and still in the block they can be a pain to remove. The proper way to remove the tube is to pull the pan, but I have in a pinch driven the tube down until it fell into the pan then put in a new tube or a universal. Don't trust the dipstick length (tube length is irrelevant), always calibrate dipstick length @ an oil change.

Lokar : Engine Dipsticks

Lokar is committed to providing quality custom automotive products. Quality... Plain and Simple!

www.lokar.com

View attachment 100731
View attachment 100732

That is a killer diagram I appreciate it a lot. Light of day I will take a look and see what I see.

Thank you again.