Doesnt work that way anymore, the body control modules and TCm and can tell when a cluster has been removed and new one installed, leaves behind codes and what not. In most the cluster wont even work unless a tech goes in programs the vin and matches up the mileage.
Per the sludge, unless the OP or tech comments you really wont know.
Assume it is factory fill with the factory oil filter and assume the engine consume 1 qt every 5000 I suppose the original owner could of cooked off a few qts and drove it around very low on oil and sludged it up. I mean Muranos are kind of fodder cars were half the people who buy them dont have a clue anyways, so I would bet original oil run low.
Originally Posted By: Garak
Originally Posted By: HangerHarley
You suspect a changed cluster - hadnt thought of that
So it has 215,168 miles.
I have also seen people yank their odometer/speedometer lead in an attempt to avoid accruing miles while on warranty. All we see is a messy engine that claims 15,000 miles. As others have pointed out, we don't know anything about coolant contamination, and we certainly have no independent confirmation that 15,000 miles was the actual amount driven. But, as all those who fail to do maintenance, it "must" have been changed every 3,000 miles.