Product review (2 stars): This is very poor quality grease
This is very poor quality grease; it's possibly the weakest link in the engineering of the whole mixer, and especially disappointing in the context of KA's claim that their machines are "lubricated for life"which would be a fantasy even with good grease for someone who uses the mixer heavily.

Many owners of KA mixers have experienced dark brown oil leaking out of the machines. Outside of the most extreme cases, they've been told it's normal. Why is it normal? Only because very low quality greases separate. The thickening ingredients are poorly bonded to the base oil, so the two come apart, leaving sludge packed into the corners of the gear box (in the case of this grease, it's mostly bentonite clay), and light, low-purity petroleum oil in puddles inside the mixer and in the food bowl. This is bad not only for your merengue; it's very bad for the gears.

KA's hedge is to pack tons of this goop into the gear box, with the hope that it will magically redistribute itself and keep fresh grease in contact with the gears. Unfortunately, as the grease ages, it gets thicker, not thinner. So every mixer experiences a gradual degeneration in lubrication quality over the life of the mixer.

This is compounded by KA's use of a worm gear in the transmission. A worm is a sound engineering choice; it allows huge speed reduction and torque increase in a small space. But it also creates a lot of friction and heat and wear. A worm gear calls for better than average lubrication, not this stuff.

If you're a serious mixer user (breads, etc.) I'd recommend overhauling your mixer as soon as the warranty's up. Get a fresh gasket. And a metal gear housing if you have an old-stlye plastic one (a worse engineering disaster, but easily remedied). And get some good #2 synthetic food safe grease. A lot of people, myself included have had good results with Super Lube all-purpose synthetic grease. The mixer runs quieter, cooler, and there's no possibility of black goo in your food.