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[towbiz]

OK guys, I need some advice. I have a 74 TR6. It is using/lossing enough oil to foul plugs on #4 & #5 in 100 miles, the rest of the plugs look great. The motor was built about 2,000 miles ago. New rings not pistons. Head has been check for cracks, surfaced and a valve job. Pulled plug #4 after a drive last week, wet oil around the plug and head. Could this be an emmisions system issue, or more likely a bad ring job? One additional thing. There is oil residue on the rear of the car.  I welcome any and all feedback. Thanks in advance.

 

[TR3driver]

Have you tried running a compression check, or temporarily disconnecting the emissions hose from the rocker cover?
Is the oil burning relatively recent, or did it start right after the rebuild (or before the rebuild)?
Were the valve guides checked for wear (or replaced) during the valve job?

Unfortunately, the most likely explanation appears to be broken rings and/or damaged cylinder walls.  But since those are expensive to repair/replace, it makes sense to exhaust all other possibilities first.