In the past Moly Disulphates and Moly Disulphides have been discussed and if I remember correctly one or both are not really all that safe for extendeded periods of use. So,in a recent oil analysis of the Pennzoil 10/30 Purebase moly was detected. I called Pennzoil this morning and sure enough they have added it to the formulation but would NOT tell me what type moly but DID recommend 3k drain intervals. Well this car is hiway only commuter and has the ability to go well beyond 3k drain periods. I am not looking for extended drains but don't want to be under the car every 3 k if you know what I mean.5-7k will do fine So even though the analysis looked good,I am changing brands because of the unknown moly and the possible repercussions from long term use of some of these types. Yes,I could go to the MSDS to see if it was listed,but even if it was I don't know the difference in the two at hand. The Shaeffers oil uses a known "friendly" moly so should I use one of these,need some feed back from you guys,the 2002 car still has less than 7k on it,,nothing has gone wrong yet and seals should not be a isue as the car is still new Mobile Supersyn ? Shaeffers 10/30 Supreme? Mobile Drive Clean blend and change a bit earlier? It might be up to the task anyway "Possible add just a bit of the 132 Sheaffers moly to it? Cuss and discuus so to speak,I need an oil! The car is hiway driven 2002 Kia Rio Cinco "Wagon" hiway commuter only,parked on the weekends Swithing from the Pennzoil 10/30 to the plain 10/30 drive Clean "while waiting on the analysis" showed a gain in fuel milaege. The Pennzoil is 10.50 @ 100C VI on their data sheet and the Mobile "tested" at 12.2 @ 100C VI,this car seems to like thicker oil and wife noticed the engine seems quieter at idle Shoot me some thoughts would ya? Am I worried bout nuthin? Or is thse two moly's a real concern over a 250k period with extended drains?