> What does the e stand for in say 528e?? It stands for the greek letter `eta' which is commonly used in physics as the ratio of the energy a motor produce versus the energy it burns. The 2.8e motor was designed to (merely) as powerfull in low revs as the 2.8i motor. with a less fuel consumption. You can have a `eta' using LaTeX: \eta Pierre F-F. '86 323i