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Viscosity change

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Old Aug 28, 2014 | 04:56 PM
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Default Viscosity change

So I have a 2000 ss. Has 120k miles and i use mobil syn 5w30 . ItsOne 100 degrees here have been burning a qt a month. What oil should I run for the mileage?
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Old Aug 29, 2014 | 08:40 AM
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Since you're burning so much, use the cheapest Wally-World oil you can find. No sense wasting expensive semi-synthetic oil like M1.

Changing viscosity won't really change your brun rate. If your oil pressure is low when hot a 10W-40 might hold pressure better in that kind of heat. If your oil pressure is good, no need to change viscosities.
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Old Aug 29, 2014 | 10:41 AM
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Shell Rotella T6 5W-40 synthetic has done me right on LS1 and LS6 engines. It's stouter oil with a better anti-wear additive package.

edit: to clarify, it has helped with valvetrain ticking noise and oil consumption issues when running Mobil-1 5W-30. It will not restore That New Car Smell or perform any other miracles.

Last edited by crainholio; Aug 29, 2014 at 11:21 AM. Reason: More info.
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Old Aug 29, 2014 | 12:50 PM
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The Rotella being a diesel marketed oil is designed to cope with turbo heat and such which may well be a step in the right direction to slow oil burning. I would certainly try it.
Just to be clear while it is diesel marketed it is API approved for gas engines.

Might try something like AutoRX to clean things a little which might improve ring seal and reduce burning.
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Old Aug 29, 2014 | 02:44 PM
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Check to see if oil is getting sucked thru the PCV plumbing.
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