Guess I'll jump off the deep end on this one and give everybody some insight on just what goes on in my head .............. Last night I was riding the bus home from the airport after a long day a flights and I was thinking about things to do on my cruiser (I'm sure most can appreciate this!). Anyway, my thoughts wandered off to the many, many posts on the subect of diesel conversions. Most of those who have done it say it's about $10k to do the conversion properly. And most who reply say you'll never really recover the costs. You have to do it because you really want an oil burner, etc. etc. This lead me to start crunching the numbers. As I figure very few of us have less than 200k miles on our 60's, I'll use this number as the number of miles we expect to keep our cruiser! $10k will be the cost to convert. 2F Gas 200,000 miles at an average of 12mpg (what most of us get - give or take) = 16,666 gallons of GAS. At current prices ($2.80/gal) that equals a whopping $46,666 to run it for 200,000 miles!!!!!! Diesel 200,000 miles at an average of 25mpg (a good estimate) = 8,000 gallons of DIESEL. At current prices ($2.80/gal) that equals a still whopping $22,000 to run it for 200,000 miles!!!!!! A difference of $24,666! If we take this further, when do we recover the cost of this conversion? This will be determined by the difference in fuel economy of the two engines - namely 13mpg. Therefore, with the conversion costing $10k and dividing that by the cost of fuel ($2.80/gal) we have 3571 gallons of diesel. Multiply this by the diference in fuel economy (13mpg) and we have 46,423 miles! Net result - drive your newly minted diesel 46,423 niles and consider it paid for! Not bad. So, that's what I was thinking last night! Food for thought giving quite a few of us are thinking of going this route!