I guess you haven't replaced a rear main seal on an 88 E-150 with a standard transmission. How about changing an oil pan gasket on a 93 Aerostar? These jobs take hours, and some require a skill set and tools that many people don't have. Those are two examples of thousands of PITA seal gasket changing jobs.
Then we go full circle to the beginning of our discussion. Not everyone has the cash to pay for the work, or plans on keeping their vehicles long enough to warrant the repair costs. So if a HM oil or leak stop can help them why not?
Then we go full circle to the beginning of our discussion. Not everyone has the cash to pay for the work, or plans on keeping their vehicles long enough to warrant the repair costs. So if a HM oil or leak stop can help them why not?