Been looking for oil for my new Gravely ZT XL 42". Great mower, only problem I've had is the tires tear up the lawn a bit if I turn too sharp, and the bagger clogged when the grass was a little wet.
Anyway, I have been thinking about the first oil change even though it is probably a year away. I am up to 4.5 hours and bought it in May. It was very dry June and July, but even in a normal year I would put on about 10-12 hours.
I noticed Costco has their Kirklands 15W-40 HD oil on sale starting Sept 2. Any thoughts on this? Or should I stick with T6 or something? I don't think the Kirklands HD is synthetic, and not sure about going 15w (or 5w with T5 or T6) instead of 10W which the book recommends.
Thoughts?
Anyway, I have been thinking about the first oil change even though it is probably a year away. I am up to 4.5 hours and bought it in May. It was very dry June and July, but even in a normal year I would put on about 10-12 hours.
I noticed Costco has their Kirklands 15W-40 HD oil on sale starting Sept 2. Any thoughts on this? Or should I stick with T6 or something? I don't think the Kirklands HD is synthetic, and not sure about going 15w (or 5w with T5 or T6) instead of 10W which the book recommends.
Thoughts?