 | Date | Question | | Answer |
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| 01/04/2008 | | | We have no information that the level of phosphorus in Mobil 1 Racing 4T is going to significantly shorten the life of your catalytic converter. Catalyst poisoning from Phosphorus is a well known issu... |
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| 05/25/2007 | | Has Zinc Been Removed from Motor Oils? | | I am having thrust bearing failure in a 4.6 modified performance engine. This is a street/strip engine. Many of my friends are having the same problem. I think it is the result of the removal of zinc ... |
| | The active ingredient that you are talking about is phosphorus which is added thru a component called ZDDP. For products that meet the new ILSAC GF-4 specification the phosphorus levels for the oil mu... |
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| 12/14/2006 | | Using 0W-40 Motor Oil Instead of 5W-20 | | I have a 2004 Honda Accord 2.4L that I recently installed 0W-40 in although Honda recommends 5W-20. With regard to engineering tolerances, I'm skeptical that there could be much difference between Mer... |
| | In general we recommend that you follow the OEM recommended viscosity grade, especially during the warranty period. Although, we think there is very little chance that you will have any issues using M... |
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| 06/05/2006 | | Presence of Zinc in Engine Oils | | Does Mobil Delvac have zinc in the oil? A lot of racers are using Shell to break in their cams in HP engines due to the zinc in the oil. It works the best. I think most oils for non-gas cars have zinc... |
| | All engine oils have an additive called ZDDP (Zinc DialkylDithioPhosphate) for wear protection. In general, heavy duty engine oils (truck oils like Mobil Delvac) have a higher level of ZDDP. Automotiv... |
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