Really strange argument
Le Mans Master
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St. Jude Donor '09
I have an 35th Anni with a Mobile 1 sticker above the radiator (96k miles). I don't think is is original but the previous owners put it there for some reason. I use Mobile1 5-30 and it does not leak or burn so it works for me. 
The owners manual does not specify Mobil1
The owners manual does not specify Mobil1
Last edited by pkazsr; Apr 19, 2009 at 07:46 PM. Reason: Research in owners manual
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My 1991 owners manual says to use regular motor oil, not synthetic. The 1992 and up LT1 engine uses synthetic. The earlier L98 engines did not generate enough heat to require synthetic, from what I have read.
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Per the info in the Corvette Black Book, you are correct. The only exception were the B2K Callaway Twin Turbo optioned cars. They used Mobil 1.
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Thanks for posting this, I have a 90 and was curious about whether real or synthetic would make a difference.
Guess keeping it real is where its at.
Synthetic is also good for causing leaks with it's cleaning detergents on sludged up engine internals.
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St. Jude Donor '10-'11
More market hype I presume.
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St. Jude Donor '10
When I switched my 85 to Mobil 1...the oil was extremely dirty inside of 1500 miles or so. I changed it...again super dirty in 1500 miles. After about a year of mobil 1 I could go longer without changing the oil due to all of the crap coming out of the motor. I did also have to fix a couple of oil leaks.