No idea jds303 - I haven't even opened the bottle yet. I have about 120ml left in the semi synthetic bottle. The semi smells fine, bit of smoke on start up, but then no more. My nose doesn't work well, but I am told (when I am brought out a cup of tea) that the mower doesn't smell too bad. But on mineral oil, it apparently did (shell little 200ml bottle I had to grab from coles when I ran out a few years ago).
With regard to the petrol, I was only joking with the BP ad of how the fuel is filled with 'thousands of ravenous piranhas'. All the muck they supposedly scrub out of the car fuel lines just end up in the filter.
I pick Caltex because it is right at the shopping centre; Shell is down the road a couple km, and BP is in a whole other direction. car runs fine on it, mower run great, so I stick with it.
I don't trust the little independent ones since I bought 5l and the mower kept stopping.
Pulled the plug and it was fouled with a weird burnt orange colour.
And I have heard bad things about shells v-power causing more gum to form than other 98's. Over here, it all comes from the BP Kwinana anyway - just a different additive packs added.
