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Old 10-07-2011, 10:29 AM   #55 (permalink)
IDZRVIT
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Join Date: May 2009
Location: Halifax
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Drives: '13 CTS-V, '76 Vette
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Quote:
Originally Posted by RedRocketRick View Post
Hey Guys....sorry I misread Z Quality's reply....obviously, I'm just learning, but trying to do the right thing.
Another question....5W30 is the specified oil for the Z, but I keep reading about the advantages of other viscositys (sp?) such as Mobil 1's 0W40.....what do you guys think about this?
Follow the recommendations in your Owner's Manual. It's far better advice than you'll get anywhere on the internet unless you have a specific use for your Z other than normal day to day driving and occasional spirited driving. 5W-30 covers a broad range of outdoor temperatures so don't get all hung up on what is the best oil for the Z - because there isn't any one best oil! It's personal preference and dino oil is perfectly fine for your Z. For now, use 5W-30 until you educate yourself on the types and usage for different weights of oil.

Btw, to answer your question - is Mobil 1 bad? You should rephrase the question and ask if anyone has lost an engine using Mobil 1 that was directly attributable to the oil breaking down during normal use. I have not heard of anyone and I will continue to use Mobil 1 in all my vehicles.
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Vette: 355 cid, 400 rwhp
'13 CTS-V Coupe: 6.2L LSA, 556HP

Last edited by IDZRVIT; 10-07-2011 at 10:33 AM.
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