About a yr & half ago, around here the dealer wanted $90-95 gal. iirc. I said ...""Uh...NO, ...that's crazy, I'll see if I can find a substitute".
That would be $180-190 fluid change!!! ...besides the motor oil & coolant. I know these mowers ain't cheap, & wiw to keep from having bigger, co$tlier repairs like a trans swap.
So, the MOBIL DTE 10 Excel 100 comes out to $5.28 per qt for me buying it by the 5 gal. bucket. I think I may have ~ 130 hrs on that last trans fluid change.
Me having a large yard, lot of trees & bushes, it takes a few hrs per mow. If I had a small yard & a small leak I'd be looking for some 1qt substitute too. :2cents: