Oil capacity of 402ci BB - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jonlopes · 05-13-2015, 12:11 PM

What is the capacity of the 402 Big block when I change both the oil and filter. I tried a search and found answers saying either 5 or 6 quarts.

I believe the oil pan and other parts are stock.

I am going to do a motor flush and change out the oil in my truck to try and help a slightly noisy lifter. The motor was rebuilt in 1992 and only averaged 1500 miles/ year since so I am sure there is plenty of sludge hiding in there.

leftybass209 · 05-13-2015, 01:56 PM

I think it's about 14 quarts, give or take 3.

seriously though, start with 5. A quart low won't starve your motor. Just continue to monitor the dipstick and make adjustments accordingly. Depending on how much sludge is in it, you may find your needs vary. Best of luck.

**71CHEVYSHORTBED402** · 05-13-2015, 02:06 PM

5.3 quarts with filter.

**davischevy** · 05-13-2015, 10:04 PM

It's a big block Chevy. Overfill it, and it will be back down to full in no time. lol

Seriously, you better go with 5.3 quarts to start.

05-13-2015, 12:11 PM	#1
Jonlopes Registered User Join Date: Mar 2013 Location: Anaheim Hills, CA Posts: 323	Oil capacity of 402ci BB What is the capacity of the 402 Big block when I change both the oil and filter. I tried a search and found answers saying either 5 or 6 quarts. I believe the oil pan and other parts are stock. I am going to do a motor flush and change out the oil in my truck to try and help a slightly noisy lifter. The motor was rebuilt in 1992 and only averaged 1500 miles/ year since so I am sure there is plenty of sludge hiding in there.

05-13-2015, 01:56 PM	#2
leftybass209 Registered User Join Date: Feb 2011 Location: Modesto, CA Posts: 2,189	Re: Oil capacity of 402ci BB I think it's about 14 quarts, give or take 3. seriously though, start with 5. A quart low won't starve your motor. Just continue to monitor the dipstick and make adjustments accordingly. Depending on how much sludge is in it, you may find your needs vary. Best of luck.

05-13-2015, 02:06 PM	#3
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,322	Re: Oil capacity of 402ci BB 5.3 quarts with filter. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025

05-13-2015, 10:04 PM	#4
davischevy Senior Member Join Date: Sep 2008 Location: Harrison, Arkansas Posts: 9,860	Re: Oil capacity of 402ci BB It's a big block Chevy. Overfill it, and it will be back down to full in no time. lol Seriously, you better go with 5.3 quarts to start. __________________ other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless.

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