I am looking at buying a 1995 BMW 540i w/ 6spd. The vehicle has aprox. 125,000 on it and is in pristine shape. That being said I have done a lot of research regarding the nikasil vs alumisil issue. I have not been able to get a good look at the block in order to find out which it is. I did however check with my local bmw dealer and bmw usa and both had no record of the vehicle ever having a block swap done under warranty. So my question is.. If I do a leak down test and find that the cylinder bore is normal, what is the chance that it is going to go bad in the future, now that our gas has far less sulfur in it? Also was there any production date in 1995 that the 540i came from the factory with an alumisil block? The car was originally purchased here in CO. and has remained here its whole life, does that make a difference? I did talk to the orig. owner who put most of the mileage on it and he said that he always used premium gas. I would appreciate any advice you guys can give me! Thanks!