Has anybody heard when the first oil change is needed?

500 miles like the previous dry sump Corvettes?

D.

 

7,500 miles. Also a DCT filter change at that time.

 

The 500 mile oil change is not required on the C8. I think 7,500 might be just a tad too long IMO. I typically recommend the first fluid change (engine oil and differential) around 1k-1,500 miles.

 

I agree with you. GM is recommending the 1st oil change at 7500 miles. I will likely change it at 1000. My C7 Z06, 500 miles was required. I changed the rear diff myself at 3,000 miles.

 

FWIW, the 500 mile oil change on the C7 dry sumps had nothing to do with the oil wearing out, debris from engine break-in etc! It was all about GM's problem that was spelled out in a Bulletin 13 months after I got my September 2013 C7 Z51! Up to that time all oil changes were to be done when the OLM said. That was for Wet or Dry Sumps. In fact all of 2013 and much of 2014, Dealers required the OLM to be under ~20% OR THEY WOULD NOT change free! Since we got UP TO 4 changes in a max of 2 years, the Dealers rightfully were concerned GM would not reimburse them for early changes that could use all 4 FREE when for some low mileage cars only ~2 would be allowed under the max 2 year rule!

The issue was the curing engine seals were allowing some silicone to enter the oil. That "Might" deplete the antifoam agents that is in all oil, including the factory fill (which is standard Mobil 1.) That bulletin said:
"IF the engine is operated at "sustained high speed" there was a "CHANCE" that oil foam would form and enter the dry sump tank (with the scavenged air from the crackcase) and could flow though the hose from the top of the dry sump tank to the air intake tube (designed to burp that scanaged air into the air intake.) That foam could flow down to the air cleaner and drip on the ground!

So the issue was POSSIBLE oil dripping on the ground. The last sentence said the oil foam causes NO HARM to engine durability.

The C8 integrated dry sump tank with the engine doe not have that air burping issue!

Yep you can change oil anytime you'd like BUT the LT2 does not require a change other than when the OLM says. Spend your money how you'd like!

 

I would trust Rich's advice considering he has worked with thousands of Corvettes.

 

Whatever it is, I certainly hope no one posts a YouTube video titled "First C8 Corvette Oil Change!!"

 

I prefer to spend my money on oil rather than engines.

 

Chevrolet is telling the sales folks 500 mi while at the Spring Mountain training.

 

Whatever allows you to sleep at night! But if taking that extra precaution might as well change the DCT fluid as well.

 

Don’t forget the air in the tires, antifreeze, and the windshield wiper fluid, change them out too!

 

I'm going to go in after the 1200 mile break in. I'm also going to have them add 2 quarts of DCT fluid at that time since it doesn't need to be replaced and will add some additional cooling capacity thru the additional volume. Some will go earlier, others later.

 

Did mine at 800 miles and I actually slept better afterwards, my two liters of transmission fluid is going in this weekend.

 

Oil is pretty cheap really. Did you get a chance to see / examine the old oil?

 

yes I’m someone who stands under the car everywhere it goes , too bad if dealership doesn’t approve and track alignment shop rolls their eyes at me too . Oil looked like I could have put it back in and I did not see metal shavings in oil filter, if I cut oil filter in half maybe I would ? Have seen something? Also the dealership mechanic told me the c8 does need a 500 oil change ( I was 300 late) and he told me he has a video on c8 to prove it , i didn’t see video I was changing it before 1k no matter what anyway.
it took 7 and 3/4 quarts of oil

 

Don't think anyone saw the video!! Probably did not understand why the C7 Dry Sump needed one per GM 13 months AFTER I got my September 2013 built C7 Z51!

Per the GM Bulletin issued November 2014, it was because: "Silicon from curing seals MIGHT cause oil foam IF the engine was operated at SUSTAINED HIGH SPEED. And that oil foam MIGHT go into the air intake tube with the burped air from the dry sump tank,run down to the air filter and DRIP ON THE GROUND! The key reason was the CHANCE oil would drip on the ground. As the last sentence said, OIL FOAM WILL DO NO HARM. That is why it was not required for Wet sumps because without a dry sump tank with a hose going to the air intake NO OIL COULD DRIP ON THE GROUUND.

Or perhaps he had worked at Jiffy Lub who always recommends changing at 3000 miles or 3 months whichever occurs first! Just my thought!

 

Well worth the price for peace of mind.

 

I’m not sure why a 500 mile first oil change triggers so many guys ? I personally feel better knowing if their was any metal shavings from break in they are now history . From this point on I will be getting yearly oil changes in the spring before autocross/ tracking season I only average 4,000 miles a year .

 

Don't forget a tire rotation !

 

I wasn't commenting on it being wrong to change at 500 miles, only the mechanic saying there was a C8 video that showed it was necessary!

In fact, although my September 2013 built C7 Z51 did not have the 500 miles change requirement and since I change my own oil, I did at 1500 miles "just in case" AND to install two magnetic drain plugs. In fact until about mid 2014 dealers WOULD NOT CHANGE oil for FREE until the OLM said less than ~20%. They had a good reason since we were to get 4 free oil changes (remember this was before the GM bulletin in November 2014 which added a 5th) BUT that had to be within 2 years. So if driven less than about 7500 miles/year we would only be entitled to two FREE changes. Dealers were concerned they would NOT be reimbursed. It fact there are forum posts where dealers where not reimbursed and made the owner pay!

ALL THAT SAID, SINCE THE C8 WARRANTY SAYS 2 FREE SERVICE IN THE FIRST YEAR, DID YOU GET THE 500 MILE CHANGE FOR FREE???