Does anyone know what effectual difference the viscosity of different greases will have on items such as your hubs, headsets or bottom brackets? The reason I ask is I recently repacked my hubs with Lubrimatic Marine bearing grease. This grease is definitely thicker than the Shimano grease that was originally in there. I believe everything is adjusted properly as there is very (almost none) little play in the hubs until I have them in tightened with the QR. However, I believe they are not spinning as long as they used to with the small amount of thin grease that was in there. Don’t flame me here but – will this slow me down (not that it matter)? Does thicker grease have any real effect over long term rides in terms of energy consumption? Do most of you like the low viscosity thin stuff because it makes your wheels spin faster?