I wasn't talking about emissions, I was talking about engine life. Fuel and oil is part of it, for sure. The fuel requirements at full boil would be similar, as the displacement and power output requires a certain amount of fuel. Oil? Much the same to make it live. More accurate fuel metering with the etec system for sure. The Suzuki 800 has a 5.7 mm shorter stroke, and a beefier bottom end. The lower piston speed means lighter reciprocating parts,and less shock loads on bearings and crank pins. That being said, if someone actually tells me they thought about polluting less when they bought there're sled, they'll be a good candidate for a career in comedy. And a guy getting an estimate for $3000 to fix his sled with 5k on is highly unlikely to care about the emissions. That was an EPA thing, not a request by consumers. Not saying they aren't great sleds with the best tech, but they aren't the most reliable engine, the Suzuki is. Cats recent ideas? Steel bushings in the suspension parts, anvil strong 2 and 4 stroke engines, the best front end in the business, a 180hp 02 feedback engine in a light chassis, roller secondary's, excellent controls and bars, simple, light, reliable primary clutches, an American made 600 with zero failures in a chassis that's the lightest combination of a liquid cooled sled on the market. Not as many as BRP, but just as fun to ride I think. And you don't have to buy a kit to lube your crank bearings. Now don't flame me for saying this, I'm a Doo guy, but I don't wear rose coloured glasses. Just read the Doo 4 stroke forum. There's a lot of guys on there that got let down by Doo 800's, and they say it.There's lots of great sleds out there. Oh, and the Cat beside my Rev 800 in the garage? $300 and next winter it will have a quiet 220 hp with knock control on pump gas. Can't afford an 850 this year, I'll have to live with these two. Woo. Light the torches!