I assume that you used either their
5 MINUTE MOTOR FLUSH or their
SYNTHETIC MOTOR FLUSH. If so, plan on doing a short interval oil change in the next 500-1000 miles (personally I'd go no more than 500 miles).
That's because this product is more than 75% solvents, mostly kerosene, and simply draining it with the oil does not eliminate it all from the system, nor does the new oil really dilute it in any way. Instead, the remaining solvents tend to cause an early breakdown of the 'new' oil.
Don't get me wrong, I'm not averse to using a motor flush at all. But, if you don't get it all out, your attempt to clean the motor can, over the long run, actually do more harm than good. If flushing the motor, consider it a $100-$200 project, or don't do it at all.
You don't state what weight oil you were running before the flush. While you may well have improved the engine performance, if you started with 40 or 50 weight and switched to 30 weight, that could well account for what you're experiencing. Btw, the general concensus is that 30 weight oil is too light for the M96 engine (do a search on motor oil weights here - no shortage of reading material). If short servicing it in the near future, I would recommend refilling with a 40 weight oil.
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