Recently purchased this 2000 Miata, and I am in the process of performing maintenance. It's the usual timing belt, seals, water pump, etc. The engine has 161K miles on it and is the original so far as I can tell. I am the third owners and as far as I can tell for the history of this vehicle's oil changes, it was dealer bulk oil from new until 89k miles, from then on out the previous owner used supertech oil and filters. I recently changed the oil and filled it with Rotella T6 and a Purolator classic, so we'll see how that works out when I get a UOA done next change.
From what I can see other than the varnish, everything looks clean.
From what I can see other than the varnish, everything looks clean.