$13 for full synth is a bargain MF
I used to get the little bottles of semi-synth Ryobi oil at bunnings for $5 each, then eventually decided to get a litre bottle of Penrite Greenskeeper for $14.
I went the next time, and semi-synth was on special for $14.50, so I took back the unopened greenskeeper and have been using the semi ever since.
Has taken a year, but I am just about finished it, and have bought the top line Penrite full ester synthetic Motorcycle oil - $24 on special. Thats $4.8 for 200ml - cheaper than most of the 200ml bottles
Just about every drop of the fuel gets used around here - I drain the tanks after use, so I don't end up with tanks with off fuel in (although I did yesterday in a quantum engined masport
)
I use Caltex 98 - because I don't want any of those pesky little BP ravenous piranhas in my tank
But I notice no difference between 95 and 98
