Rocketraider - I remember the old 1.8 and 2.0 liter engines used in the Firenzas. Seems one was Mexico built and the other perhaps US. But when I started selling Oldsmobiles in 1985, we had lots of Cieras in stock, many with the 2.5 liter Tech 4 motor. The guys told me this was the "Iron Duke" engine. I know that engine was not available in the Firenza. So, is the 1.8 or 2.0 really the Iron Duke? And was the Iron Duke really a "Pontiac" motor to begin with? What I know, what I think I know, what I remember, and what I think I remember are getting mixed up. I do know we used to sell Cieras in the 80's like we do Camrys now. In an earlier life, the Firenza was known as a Starfire. That was a disgraceful application of a proud Oldsmobile model name onto a Chevy with lock washers. I talked my fiance into ordering one of them in 1978. That little son of a gun got between 41 and 44 mpg on the hiway consistently! (Probably had the Iron Duke?!) But many other problems persisted and with no dealer/factory help, she sold the car and got a Trans Am. Fuel mileage and tire wear were reduced 50%, minimum! But, I have digressed. Thanks for any clarification you can offer on the Iron Duke. John