Oil capacity

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Aug 9, 2025 | 12:31 AM

blu63sky

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Intermediate

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From: California

Oil capacity

Has anyone have this issue regarding oil change at a dealership. My 2005 C6 with the base engine has an oil capacity of 5.5 quarts with filter. More than one Chevy dealership that I have had my vehicle to for an oil change have put in 6 quarts which was for the optional engine at that time. On more than one occasion I have had to go back to have a half quart drained out. The manual warns of the danger of overfilling. Just wonder if the technicians just assume that 6 quarts is ok or who knows.
Just curious if anyone with the same model/year have had that experience. Can be a real pain until they understand the correct spec

Aug 9, 2025 | 07:29 AM

1bdvet

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From: Plantation Florida USAF(Retired) 1966-1990

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I have a 2005 and it takes 5.5 qtrs, never heard of 6 quarts, did you read your owners manual, if not here is one the web:

https://www.corvetteactioncenter.com...05corvette.pdf

Aug 9, 2025 | 07:56 AM

seijack

Drifting

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From: Cincinnati Ohio

From the owners manual see below. I could be wrong but I think the Z51 option M6 has an external oil cooler, and the Z51 A6 has the oil cooler in the radiator.

Aug 9, 2025 | 08:47 AM

FatsWaller

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From: Etobicoke (Toronto) Ontario

There was no optional engine. There was a Z51 option that has an engine oil cooler if the car was an M6. Automatics didn’t get one. The factory fill for the M6 cars was 6 qts because the oil cooler would have been empty. But when you drain the oil for an oil change, not much if any oil drains out of the oil cooler, so 5.5 qts is the fill amount after an oil change.

Aug 9, 2025 | 10:33 AM

lobstah24

Burning Brakes

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From: North Dakota

This is why I do my own maintenance.

Aug 9, 2025 | 11:41 AM

Dave S

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From: Jackson NJ

As others have noted, the base engine takes 5.5 qts. The Z51 option with oil cooler takes 6.0 qts. Check the tag in the glovebox to determine whether you have the Z51 option.

Aug 9, 2025 | 10:47 PM

VettesRcool

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Quote:

Originally Posted by Dave S

As others have noted, the base engine takes 5.5 qts. The Z51 option with oil cooler takes 6.0 qts. Check the tag in the glovebox to determine whether you have the Z51 option.

As mentioned earlier in the thread, the oil cooler does not drain out the extra half quart so still use 5.5 quarts.