Excerpt from my most recent UOA (Cannot finger out how to post the whole report - converting .pdf to .jpeg?):
"""Toyota makes nicely wearing engines and yours is no exception. All wear metals read right on average after running the oil about 400 miles longer than average and that is a good sign that no problems are developing in that area. Insolubles, which show oil oxidation, were on the high side high at 0.6%, so the oil filter didn't do quite as good a job this time, so it would probably be a good idea to stick with a ~5,000 mile oil run for now. The TBN was strong at 3.9, showing lots of active additive left. No fuel dilution or coolant was found and the viscosity was normal."""
This was the first time I have ever had the oil up to 5K miles. Prior to that 3K to 3.5K was what was scheduled. Looks like the oil did super well but it also looks like they are blaming a bit of oxidation on the filter? I only use the 20004 and cannot see how that was contributory, but in any event, assuming the oxidation is okay, it looks like M1 can easily handle a forced induction 1FZFE for 5K miles. I think this also proves that the 7.5K or even the 10K schedules some have here would be too much for a forced induction 1FZFE. Anyways, just thought I would share something, any thoughts on the oxidation? Thanks.
"""Toyota makes nicely wearing engines and yours is no exception. All wear metals read right on average after running the oil about 400 miles longer than average and that is a good sign that no problems are developing in that area. Insolubles, which show oil oxidation, were on the high side high at 0.6%, so the oil filter didn't do quite as good a job this time, so it would probably be a good idea to stick with a ~5,000 mile oil run for now. The TBN was strong at 3.9, showing lots of active additive left. No fuel dilution or coolant was found and the viscosity was normal."""
This was the first time I have ever had the oil up to 5K miles. Prior to that 3K to 3.5K was what was scheduled. Looks like the oil did super well but it also looks like they are blaming a bit of oxidation on the filter? I only use the 20004 and cannot see how that was contributory, but in any event, assuming the oxidation is okay, it looks like M1 can easily handle a forced induction 1FZFE for 5K miles. I think this also proves that the 7.5K or even the 10K schedules some have here would be too much for a forced induction 1FZFE. Anyways, just thought I would share something, any thoughts on the oxidation? Thanks.
