The Critic
Thread starter
Not exactly the same engine, but these photos are from a 11 Accord 2.4 with about 110k. This engine has only seen 10k oil changes. Most were with EP 0w20, but some were with other brands of 0w20 synthetic. You be the judge.based on your experience, sounds like it's hard to remove varnish once established and best is to avoid or minimize it to begin with.
Assuming that the previous conventional oil caused the varnish ... Would it be safe to say if a good syn (EP or Amsoil) was used from the beginning , we would not have the varnish?