Lucas vs. Mobil 1 Oil Test

Discussion in 'Dodge Challenger General Maintenance' started by SRT-Tom, Aug 25, 2021.

  1. Cloverdale

    Cloverdale Full Access Member

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    The bearing wear is so similar in appearance it's reaching to make the case that one product is significantly more protective than the other (especially when considering the unknown variables including pressure parameters and beyond involved). A better case could be made for the failure of both products. Aren't these guy's that produce and distribute this stuff risking a suit for damages?
     
  2. 2009 Classic B5

    2009 Classic B5 Full Access Member

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    Bearings in an engine are hydrodynamically lubricated. They are designed to be non-contact and use retained oil to protect during startup until oil pressure builds. The only time bearing wear becomes an issue is when oil pressure is lost or during extremely cold (-30°C/-22°F) starting when oil pressure can take seconds to build. But SAE 0W oils should provide adequate oil flow even at these temperatures.
    The only wear problem experienced in modern engines is turbo bearing coking and timing chain wear. Long chains for DOHC engines can wear causing timing change of the intake and exhaust cams. There is a new wear test specifically for this issue in the latest API specifications. All modern oils will pass this and all the other tests.
    The metal on roller wear test shown in the video is a wear regime that simply does not exist in engines. Even slider follower camshafts do not have this specific wear regime. They are sliding followers with rotation of the follower over the cam. Roller follower cams don't wear like this unless the roller fails, then all bets are off as the follower will fail shortly anyway.
     
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