Why don't small cars need grease lubrication?

[DiEvan]

Small cars do not require grease lubrication for the following reasons: Changes in wheel bearing structure: Previously, wheel bearings on small cars were open, making grease prone to leakage. Without grease fittings, regular maintenance and grease replenishment were necessary. Modern passenger cars have redesigned wheel bearing structures with pre-packed grease that is less likely to leak. These bearings are now one-time-use components that cannot be regreased. Changes in universal joint structure: In the past, universal joints on small cars were open and equipped with grease fittings, requiring regular grease replenishment. Modern versions feature dust covers containing lubricating grease, eliminating the need for maintenance as long as the dust cover remains intact.