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Originally Posted by Jake Raby
Track related M96 engine failures are not entirely dependent upon high speed cornering and the associated G forces.
Oil that cannot take exceptionally high temperatures without losing its ability to maintain pressure is the single biggest element that we have seen. Oil temperatures of m96 engines can exceed 250F and at that point off the shelf oils lose their ability to maintain pressure. In this scenario the G forces further aggrevate the pressure issues and appear to be the culprint, when they are really just a part of it.
All the issues we have experienced with the M96 failing on the track due to oil pressure issues have been experienced at the end of sessions when the oil is heated exceptionally. I haven't talked to a single person who experienced a failure in the early laps of a DE or track event, only after the oil is heat soaked and thin. In my personal 996 equipped with an accusump I noted this with my data acquisition system on track at Road Atlanta where turn 1 and turn 7 were the worst for oil pressure, but only after the oil temps were eleveated and the session was 3/4 over. That was with coilovers all around and sticky tires.
Just something to consider.. The accu-sump does help a lot. We do not have on- track issues these days, even without an X 51 pan and other measures that are commonly applied to overcome what appears to be the root of the issue.
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Thank you VERY MUCH for this explanation
So for people like me who track their cars regularly what oil and probably more important what oil weight would you reccomend
Especially for people who live in hot climates in the summer and don't have to worry about cold temperatures (I am happy to put in a different oil during the off-track (cold) season)