Burn Seafoam in my 10 yr old Merc 175 EFI ever since it was new. 280 hrs and still runs like new. I also use it in anything twostroke. Chainsaws,leaf blowers, etc. Use it in my Polaris Ranger and John Deere mowers. Dump a can of it in my Jeep, Avalanche,GMC pickup 200,006 miles on it and wifes...