Apparently the manufacturer claims that RESTORE can help with some bearing problems as long as they are not too far gone. See extract, below, from their web site …
"Worn small end bearings. Small end bearings are fed by oil splashed up from the sump or by direct oil feed from the crank oil supply. By splash, the oil rebounds off the underside of the piston (cooling the piston in the process) and then drops into countersunk holes in the top of the connecting rods. This lubes the bronze small end bushings by gravity (assuming the countersunk is not ‘sludged’). Expect a repair in 500 miles or 10 hours of operation. The other type of conrod is lubed by force-feed, where there is an oil-way drilled up through the connecting rod so the small end is force fed by oil coming through the crankshaft from the oil pump. Expect repairs with RESTORE in under 20 miles or 30 minutes of running the engine. We would recommend a flush just in case the conrod oil-ways are clogged up with black sludge, then add the RESTORE with new ordinary supermarket oil and a new filter and drive normally.
Fledgling big end bearing knock. This is a tough one as we need to catch the damage as quickly as possible before the main and conrod shell bearings rotate on the crank. We have had very good results if the damage is caught quickly i.e. the instant the knock is first heard. Most conrod shell bearing damage results from zero oil supply (a red oil light) or from a cracked cylinder head where the coolant water washes the oil off the metal surfaces; shell bearings silver and lead are the first to go, and the cylinder walls then heat up due to friction and eventually the engine can seize solid. So if a bottom end knock, which sounds like a constant thud, thud, thud, is heard (caused by either lack of oil or coolant water in the oil) stop immediately and do not drive the vehicle again until the problem is fixed. Then use RESTORE to try and repair the damage by running the engine very gently at first until some improvement is heard. If the parts are too far gone the noise will inevitably get worse and the parts will need to be replaced."