Thanks Ford850. I never thought about looking at Menards. I paid $54.99 at Tractor Supply for a 2.5 gallon container. I'll check Menard's price. How often do you change your oil? Mahindra says every 100 hours for oil and filter. Some have told me, they go longer between oil changes when using s full synthetic.
I usually find the gallon jugs are a better deal than the 2.5 gallon. The difference isn't substantial, but the best deals are when Shell has rebates too. Then I pick up T6 at Menards while they have there 11% rebate going, and get the additional rebates (if available) from Shell. In the end, I don't want to waste time or fuel driving all over trying to save a few dollars though.
I'm no oil expert, but I change mine at least annually. It's plenty dirty by then, and it's not a great expense to change it. I think changing your oil regularly is more important than the oil you choose. When I change my oil, it's a good time to check bolt torque, tire pressure, clean filters, clean the radiator fins, grease everything, and give the tractor a good check up. That's just my process, and you'll get a lot of different opinions on here about oil. There's not one perfect answer.