[bigborian]

Originally Posted by Lil bastard

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.

I used 10w-30 full synthetic before and after because that's mostly what they sell in 90% of stores around here. I usually keep a very close eye on my oil levels and color. Making sure that it's no darker than golden brown and it's sitting right right at optimum level. My next oil change i'll have to try a 40 weight or 50 weight, but so far 30 weight has been good to me. If i notice the oil getting much darker prematurely i would of course change the oil earlier but for now i've been noticing the car runs much smoother, much better throttle response and it just feels not as heavy as it used to.

This was my experience with the motor flush i'll have to update this after sometime to see how it all worked out.