C7 ZR1 Discussion General ZR1 Corvette Discussion, Technical Info, Performance Upgrades, Suspension Setup for Street or Track

Review here at 500 miles

Old 06-12-2019, 05:34 PM
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Originally Posted by hcvone View Post
You guys have 93 octane or 91?
I have 93 octane, ethanol free within 5 miles of my home. I am so fortunate !
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Old 06-12-2019, 06:57 PM
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Originally Posted by propete View Post
I have 93 octane, ethanol free within 5 miles of my home. I am so fortunate !
Yes we do to, but many states have only 91, I even have 100 on tap at my local Sunoco that goes in the other cars
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Old 06-12-2019, 08:01 PM
Rinaldo Catria
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I have a choice between 91 pure gas(Shell or Exxon) or 93- 10% ethanol (BP).. I asked Chris Chessnoe (Callaway Chris)about which was better for my C6 Callaway SC606.. he said go with the higher octane with 10% ethanol over lower octane pure gas. I assume that true even moreso for the LT5..
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Old 06-14-2019, 04:24 PM
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Originally Posted by samgauto View Post
Just adding this update now at 2,300 miles. Found what appears to be AC Pag oil visible on front crosshatch cross member. Took to dealer last week and they have verified that air compressor needs replacement. Part now on order and will be replacing shortly. Not sure if anyone else has had an early ac compressor failure by leaking oil.
Dealer replaced compressor today. They found oil was leaking from the pressure release switch on compressor as others have experienced in the C7 general forum. They installed another compressor and stated that the replacement appears to be redesigned. They thought it would take 7 hours but they got it done in just over 5. They also stated they had to reprogram the ecm for a misfire. I believe this is the service bulletin that talks about injector 7 hanging open on decel as was discussed in another post as TSB 18267 which was not a recall last time I checked in acdelco tds but perhaps that changed. I am not sure if this means no more flames at WOT or if its just for that hanging injector issue. They wrote it up as "18267 Flames from exhaust due to misfire-flames self extinguish" "9103859 reprogram and set up ecm per recall."

Last edited by samgauto; 06-14-2019 at 04:32 PM.
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