I bought myself a Mazda B2000 RWD last summer and I have some questions regarding its powerplant.
It's a 1987 truck with a Nissan SD22 from a 720 Pick-Up, 1982-1984-ish. It has, from what I can see, a Nissan, 4 speed manual transmission with the original standard Mazda axle.
I'd like a straight answer, no fantasy numbers, what kind of fuel economy might I expect from this engine in the long run? I know that the SD22 is a 2.2 liter engine and has 60/45 hp/kw of power and 125/92 Nm/lb-ft of torque. No rocket exactly.
I've seen people claiming down to 5.5-6.5 l/100 km, 45-50 mpg with this engine, with 4 spd and 5 spd transmissions. My estimate does not come far from that as I've driven this thing for roughly 250 km, 155 miles since I got it, and it has used less than 20 liters of diesel, 5.3 gal. Note that this is also accounted for idle running and spilled from when I had the injectors apart and bled the system for air. I must say that this engine is amazing in this regard, and I barely believe it myself!
But I haven't had the oppertunity to drive it on the highway, just backroads and old dirt roads to keep myself hidden because it's not road legal yet...
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)
If I'd like to have the benefit of more power and torqe, and to fit either a SD23 or a SD25 - will I expect a massive decrease in fuel economy? Or will it be negligible?
Wich of the SD engines is the most reliable in general?
Thanks in advance!