That sounds like the best of both worlds....Scag ZTR and Kubota diesel(for your Kubota fix:0) P.S. As an aside....with diesel fuel being SO MUCH more expensive per gallon(it costs more than Unleaded Premium), even if it uses less fuel couldn't it end up still costing you more. I know the benefit of durability/longevity of a diesel, but for gas consumption wouldn't a Kohler Command Pro with EFI or a Kawasaki gasoline engine really be less costly in the long run????? Yeah, the Vanguard is definitely not the stingiest engine on gas but I'd bet it lasts as long as one of the diesels(it's not uncommon for a B & S Vanguard to see 1500-2000 hours and still be running strong). P.S.S. Another tidbit I picked up recently(may not apply universally, but most likely does)....I had tried "heeling my deck" after installing a mulch kit, trying to see if it would stripe better. The Gravely Owner Manual simply stated: "Certain cutting conditions require the deck to be pitched with the rear of the blades lower than the front. Heeling the deck this way requires more engine power but can provide better cut quality". In another thread a user asked me to ask Gravely what "Certain cutting conditions" meant. When I asked, the Gravely Support Specialist said...."the only condition that we recommend heeling the deck for is when you are cutting Bahai grass". Maybe this is something you need to ask the Scag dealer about(whether Scag recommends heeling their deck for Bahai). You may end up making those Bahai lawns look so good you'll have to beat off customers with a stick:0)