Grease is not the word

"Bridgestone does not recommend the use of petroleum products as a lubricant in tire mounting or demounting operations.

Only a vegetable oil lubricant should be used. Do not use solvents or petroleum products as a lubricant in conjunction with tire mounting or demounting.In those cases where a tire submitted for adjustment consideration for bead related damages shows evidence of having been contaminated by petroleum lubricants or other non-recommended material, the adjustment will be disallowed by Bridgestone. The use of nonrecommended products or materials may result in the deterioration of rubber and eventual failure of the tire.

Acceptable lubricants such as Murphy’s Soap, Ru-Glyde, Bishmans, etc. are recommended for mounting and demounting passenger, truck and bus tires.

WARNING: If you have any doubt about whether some practice is 100% safe or not, then stop and ask another professional and contact the tire manufacturer or their representative for help. Do not take chances with your safety or that of others. For more tire safety information visit: www.rma.org.