Feels like I gained 30hp

[TowX]

Finally, after more than a year of procrastinating I had all the fluids in the X5 changed last week. Fresh Motul 7590 Synthetic in the front and rear diffs, BMW lube in the transfer case, and 5W30 Syntec in the engine (that gets done every 5000 miles). Trans fluid was fresh a few months ago when the trans was replaced under warranty.

On the cold mornings we've had recently, anywhere from 0 to 20F in the morning, there's so much less drag from the thick old lubes that it feels like I've gained 30 horses in the morning. And even after everything's warmed up it just feels much more responsive. Nothing changed but the fluids. Even my ex commented over the weekend when she borrowed if from me to move a piece of furniture, she asked me if I'd chipped it there was such a difference.

Nothing like fresh synthetic fluids to free up the drag on all the running gear.