quote:Very interesting, JohnnyG. I will keep an eye out for excess oil consumption, in which case I can back off on the level to see if consumption goes down. Given that Ford says my overfill is OK, I don't expect any problems, but never hurts to be aware. I do like running it high for the extra cooling and contaminant holding capacity. Presumably if I don't see increased consumption, then the rings should be OK too as the oil is not burning past them.
Originally posted by JohnnyG: Some engine may only suffer lower fuel economy. Most will burn off the excess oil quickly, leading some to think that either the oil or engine is garbage. If you make a habit of overfilling, the long term effects can be more serious, like stuck rings. I found it better to run my Northstar a little low (7 quarts), (it holds 7.5 quarts) rather than at the FULL mark (which takes about 8 quarts).
quote:Probably over filled by about a 1/2L. I burned 3L of M1 5w30 over the last 5k kms, so I'm thinking this slight over fill will burn off quickly in my 4cyl Acura with a 8000rpm redline. I mixed in some M1 0w30 this time, so I'm going to monitor the effects of this.
Originally posted by RavenTai: How much extra did you put in?