[Jcslocum]

Those number are making my head hurt. #2,5&6 show the same PSI but different % of leakdown. This test is usually done at 100 PSI input and then the differential is your % of loss.

No, #3 had nothing to do with the numbers from the other cylinders. That plug has to be removed before you buy or the cost of repair has to be deducted from the price. It could mean head removal to repair in the worst case.

Why did you pay for the plugs at all?? The owner has them in his car, not you expense in my opinion.

Good luck and if the price is right, it may be a good buy and with some driving, #1 may come up. Could be carboned up with the 1000 miles a year use.

Just my .002