I would do the same thing and change the oil.
Suck it out and good to go.
And yes I do want to sell oil to make money.
Actually the 50「 profit on selling 400ml of oil will not make me rich.
Some time ago I went to a fixed price service of $ 80.00 for push mowers includes filters, oil, blades, plug , fuel lines, fuel taps, wheel bearings , starter cord ,nuts bolts & control cables that need replacing.
Self Propelled are $ !20.
I stress that this is for a service on a running mower & not a repair on a non running mower & make every one start their mower when I book them in.
For this service I guarantee the mower will run fine till the next bi-annual service and they all leave with a tank full of nice clean fuel and a big smile.
Had one come back with a clogged air filter which I replaced no charge and gave him another to tide him over till the next service. He sent both his neighbours down. I dont get that sort of benefit from the $ 100/ month advertising and this cost $ 2.5 for 2 Quantum pre filters
This shift came by accident after a fixed price home service mower repairer rang me and asked if I was interested in the mowers in this area as he does not travel this far west of the city.
These people demmanded a "Fixed rate"before they gave me the mower so I plucked a figure out of the air not much different to Peter who charges $ 75.00 and recognising I can not get the same job density.
Worked treat so I started doing it with most of my customers and am actually making more than before because every mower gets all consummables replaced regardless .
What really got me thinking was when Peter told me he was averaging 20 mowers a day in season and 8 out of season.
So yes i can see the B&S no oil change motors being a big selling point and yes I will still replace the oil in them