Conveniently MF, I have the exact same mower. They are a cute little thing, and run well - plus they have swing blades as you have found. Its the same deck as sprinter/victa vantage by the way.
Don't hesitate to put in 15w40 - thats what I put in. Any semi-synth or mineral 15w40 is better than the sludge most of these are forced to endure. Autobarn have 15w40 Nulon for $10 this week - good enough
Also, remember the oil in the foam filter as it is pretty thin foam and practically useless without it - also watch the plastic hinges on the filter housing as they are weak as.
550ml ish capacity - checked by unscrewing the dipstick and bottoming it out like a regular Chonda.
Blades may pose an issue - I thought they were just honda blades, but I think they have a kink in them. Fortunately, mine are near new (it had done stuff all work) so I will try to get to it in the back of the shed either tomorrow or thursday and see how log they are originally.
I distinctly remember looking into it and finding that the blades for a 'Ross' Mower were right. I will have a look through my search history and find them
