evo-gsr
Well-Known Member
Its not the oil thats the problem.
Ok I’ll do a wet test. Head and valves has been recondition by the previous owner 8000km agojack of all said:Do the wet compression test. That will isolate if it is rings or valves/head related.
A leak down test is a good idea too but the wet test will tell you if its top end or rings. If its top end it might just need valve lapping
If you want to check the bottom end you can remove sump and plastigage the mains and bigends. Not a huge job.