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When to switch to synthetic in 5.3L engine.

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by stchman, Nov 1, 2012.

  1. j cat

    j cat Rockstar 4 Years 1000 Posts

    this mobil oil product does have the GM approvals for use with these engines.

    Mobil 1
    Extended Performance

    Mobil 1 Extended Performance 5W-30 advanced full synthetic motor oil keeps your engine running like new and helps extend engine life by reducing wear and oil breakdown. It meets or exceeds the latest ILSAC GF-5 requirements, and is an officially dexos1™ licensed product

    - - - Updated - - -

    This is the explaination of the changes made and why .

    GM manufactures cars and trucks in 34 countries and sells them in over 140 countries. These vehicles contain an array of more than 20 different engine sizes. To function well and to last a long time, these increasingly high-performance engines need a consistently high-quality oil, and that quality and uniformity needs to be available anywhere in the world.

    GM Powertrain engineers have developed dexos™ - a proprietary, global engine oil specification designed specifically to meet the requirements of GM vehicles. So, whether it's a Chevrolet, Opel, Daewoo, or Holden driven in Pennsylvania, Munich, Seoul, or Sydney, dexos™ engine oils are recommended by GM for use in their vehicles.

    The dexos™ specification was uniquely designed to complement the exacting requirements of GM's advanced engine technology. The specification has gone through an extensive developmental and testing process. It requires a number of proprietary tests that are not included in current industry standards and sets performance criteria at a level that exceeds many current standards. The result is a high performance fluid providing significant wear protection, improved piston cleanliness, a reduction in volatility and oil consumption, enhanced aeration control for improved fuel efficiency, and better oxidation properties. dexos™ is an exclusive trademark of General Motors. Only those oils displaying the dexos™ trademark and icon on the front label have been certified and licensed by GM as meeting the demanding performance requirements and stringent quality standards of the dexos™ specification.

    GM has found that using substandard oil can affect engine performance and, in the worst case scenario, may damage or harm the engine. Only licensed dexos™ products have been certified by GM to meet the dexos™ specification. Unlicensed products have not gone through GM's rigorous testing process, are not monitored for quality, and are not approved or recommended for use in GM vehicles. Unlicensed product quality and suitability for GM vehicles cannot be guaranteed and, therefore, use of unlicensed products may result in lower levels of performance and could cause engine damage that may not be covered under warranty.

    There are many authentic licensed dexos™ products readily available at retail outlets, service repair shops, quick lube operations, and GM service centers. dexos™ licensed products are easy to identify. Simply look for the dexos™ icon on the front label and the 11 digit alphanumeric dexos™ license number on the back label. Unless an oil package displays these two markings, the engine oil is not an authentic, licensed dexos™ product and is not recommended for use in GM vehicles.

    dexos™ is recommended by GM for use in all its vehicles except those with Duramax diesel engines requiring the use of API CJ-4 engine oil. dexos™ is fully backward-compatible and can be used in older vehicles. It is specified in the owner's manual for all 2011 and later model years, with the exception of Europe where dexos™ is specified starting in model year 2010.

    [TABLE="class: mceVisualAid, width: 477"]
    • dexos1™ is designed for use with gasoline engines and replaces GM-LL-A-025, GM6094M and GM4718M
    • dexos2™ is designed for use with light-duty diesel engines and replaces GM-LL-B-025 and GM-LL-A-025
    The dexos™ specification and trademark are exclusive to General Motors, LLC. The Center for Quality Assurance monitors and publishes licensed dexos™ products to assist consumers in making informed decisions when purchasing engine oil to service their vehicle.
  2. stchman

    stchman Active Member 1 Year 1000 Posts

    Looks like I'll just change the oil using Mobil 1 5W-30. The local Costco had a sale on it ($26.99 for a 6qt box), so I bought a few cases.
  3. TimTom64b

    TimTom64b Member 2 Years 500 Posts ROTM Winner Gold Member

    The royal purple websit queationa and answer section has some great information. I myself would prefer to give the rings, bearings, and lifters a chance to settle in first... so 5 to 10k miles.

    - - - Updated - - -

    The royal purple websit queationa and answer section has some great information. I myself would prefer to give the rings, bearings, and lifters a chance to settle in first... so 5 to 10k miles.
  4. stchman

    stchman Active Member 1 Year 1000 Posts

    Apparently GM wants to have a full or synthetic blend in the engine. IIRC, Corvettes and Camaros (with the powerful V8) come with Mobil 1 from the factory. GM does have a 100K powertrain warranty.

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