Anyone ever heard of Yanmar engines,been around over 100yrs and have a reputation of long lived diesel engines in sailboats and watercraft.I like the 53hp model which boast a 2.2 ltr at only 443 pounds,model 4JH5E.You put a light weight miata ,a 914 or a MR2 Body around this motor and Im sure mid 50s mpg would be your earnings.YANMAR.COM