I have been looking at TR's and noted two problems on an '86 car, first, the dash leather has shrunk and torn and the brown leather has come unglued around the instrument binnacle. This seems to be common, is this a big fix? Second, the oil tank has a brown sludge around the filler neck (as if condensation was in the oil). The 512 TR next to it was surgically clean. Anyone notice this problem? The car has about 50,000 km on it. This is probably not the car for me, but I thought I'd ask.