I bought a 1991 MGM GS and had a bunch of work done on it: new belts, plugs/wires, valve cover seals, PCV, etc. It runs beautifully, idles smoothly, and has... well, not plenty of power, but as much as you'd expect from a stock 5.0 .
When I bought the car it had brand new oil in it. I drove it for a couple of thousand kms and noticed the oil was getting dark, so I figured I should change it. Only 0.5 L (yes, half a litre!) of oil came out when I drained it! This, despite the oil showing ABOVE FULL on the dipstick! Yikes... so, I filled it up and drove it for another few hundred kms, keeping an eye on level and colour like a hawk. I noticed it getting dirty again (but level still high) and so I changed it again: 2.5 L came out this time. I filled it again, this time with some SeaFoam added to the crank case in case sludge is collecting the oil somewhere. After only a few hundred kms of driving, only 3.75 L came out.
So, basically, I'm using about a litre of oil every few hundred kilometers. There are no drips, no smoke, no smell, no nothing to suggest that oil is being used. The dipstick shows beyond full all the time, and it does change colour as the oil ages, so it's not like it's "stuck" on old oil somehow. When I shut off the car, there's no significant sound of oil dripping back into the pan like I would expect.
After an oil change, the "oil" idiot light stays on for slightly longer than normal, which I would expect as the oil pumps through the filter. Then the light turns off. So it seems like the pressure circuit is working fine and, even with only 0.5 L in the crankcase, the car still had oil pressure, which blows me away.
Anyone have any idea where my oil is going?!
When I bought the car it had brand new oil in it. I drove it for a couple of thousand kms and noticed the oil was getting dark, so I figured I should change it. Only 0.5 L (yes, half a litre!) of oil came out when I drained it! This, despite the oil showing ABOVE FULL on the dipstick! Yikes... so, I filled it up and drove it for another few hundred kms, keeping an eye on level and colour like a hawk. I noticed it getting dirty again (but level still high) and so I changed it again: 2.5 L came out this time. I filled it again, this time with some SeaFoam added to the crank case in case sludge is collecting the oil somewhere. After only a few hundred kms of driving, only 3.75 L came out.
So, basically, I'm using about a litre of oil every few hundred kilometers. There are no drips, no smoke, no smell, no nothing to suggest that oil is being used. The dipstick shows beyond full all the time, and it does change colour as the oil ages, so it's not like it's "stuck" on old oil somehow. When I shut off the car, there's no significant sound of oil dripping back into the pan like I would expect.
After an oil change, the "oil" idiot light stays on for slightly longer than normal, which I would expect as the oil pumps through the filter. Then the light turns off. So it seems like the pressure circuit is working fine and, even with only 0.5 L in the crankcase, the car still had oil pressure, which blows me away.
Anyone have any idea where my oil is going?!
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